Keeping a glass box full of water crystal-clear shouldn’t feel like a second job, yet many aquarists spend more time scrubbing algae than actually enjoying their fish. The trick is to stop thinking of “tank janitors” as an afterthought and start treating them as the backbone of a self-polishing ecosystem. When you match the right bottom-sucker, scrape-and-rasp, or filter-gleaning specialist to the type of waste your aquarium produces, you suddenly discover what seasoned fishkeepers call “the invisible crew”: livestock that clock in 24/7 so you can spend Saturday mornings sipping coffee instead of scraping green carpets.
Below you’ll meet ten of the aquarium world’s most tireless clean-up agents. You will not find a ranked list or thinly veiled product plugs—just the nuanced biology, quirks, and husbandry secrets you need to decide which species (or combination) will turn your 2025 setup into a near-self-maintaining underwater habitat.
Top 10 Aquarium Cleaning Fish
Detailed Product Reviews
1. Tetra Water Cleaner Gravel Siphon for Aquariums, Easily Clean Freshwater Aquariums
Overview: The Tetra Water Cleaner Gravel Siphon is a no-frills, entry-level siphon engineered for aquariums up to 55 gallons. It couples a rigid gravel tube with a flexible hose, priming bulb and bucket clip to drain dirty water while lightly agitating substrate.
What Makes It Stand Out: Simplicity is the headline—no moving parts, no batteries, just shake the bulb twice and gravity does the rest. The pre-attached clip keeps the hose anchored to a pail, freeing both hands to work the gravel tube and chase debris pockets.
Value for Money: At $8.79 it’s one of the cheapest name-brand siphons available; basically the cost of a deli sandwich for a tool that turns monthly 30% water changes into a tidy 30-minute chore.
Strengths and Weaknesses:
– Virtually indestructible; nothing to rust, short-circuit or re-prime if the power flickers
– Narrow diameter limits flow, so tanks over 40 gal require patience or multiple passes
– Hose is stiff when cold and can kink if bent sharply
Bottom Line: A rock-solid starter siphon for beginners or low-tech setups; dependable, dirt-cheap and small enough to stash under any cabinet.
2. QZQ Aquarium Gravel Cleaner [2025 Edition] Vacuum Fish Tank Vacuum Cleaner Tools for Aquarium Water Changer with Aquarium Thermometers Fish Net kit Use for Fish Tank Cleaning Gravel and Sand
![QZQ Aquarium Gravel Cleaner [2025 Edition] Vacuum Fish Tank Vacuum Cleaner Tools for Aquarium Water Changer with Aquarium Thermometers Fish Net kit Use for Fish Tank Cleaning Gravel and Sand](https://m.media-amazon.com/images/I/51S+2N20RtL._SL160_.jpg)
Overview: QZQ’s 2025 Edition Cleaner is a Swiss-Army kit for modern aquarists, bundling a hand-pump gravel vac, algae scraper, thermometer sticker, fish net and extension hoses in one flat-pack box.
What Makes It Stand Out: The manual press pump self-primes in seconds without mouth-sucking or spilled water, while an internal mesh basket blocks gravel and protects curious fry—a thoughtful safety layer rarely seen in budget kits.
Value for Money: $18.79 lands you six separate tools; buying them individually would push past $30, so the kit effectively pays for itself while decluttering your fish shelf.
Strengths and Weaknesses:
– Versatility is king: swap nozzles to switch from sand-siphoning to plant debris pick-up
– Connector o-rings occasionally pop loose under vigorous pumping—keep spares handy
– Printed instructions are tiny; first-timers should search a quick video demo
Bottom Line: A feature-rich, electricity-free cleaning station ideal for 10–55 gal freshwater tanks; minor QC niggles don’t offset the convenience or savings.
3. Aqueon Aquarium Algae Cleaning Magnets Glass/Acrylic, Small, Black
Overview: Aqueon’s Algae Cleaning Magnet lets you wipe interior glass or acrylic without dunking an arm, using a two-piece magnetic scrubber that glides effortlessly across tank walls.
What Makes It Stand Out: The scrubber half is weighted; if the magnets separate it sinks straight down instead of floating away, sparing you the dreaded “magnet hunt” behind rocks. Curved pad also contours to bow-front tanks without leaving streaks.
Value for Money: At $10.94 it’s pricier than handheld pads, but time saved on rolled-up sleeves and post-cleanup arm drying is worth a few extra dollars.
Strengths and Weaknesses:
– Scrub/Velcro pads pop off for replacement, extending product life
– Not safe for acrylic thinner than 3 mm—tiny scratches may appear on cheaper tanks
– Magnet gap tolerates only modest silicone seams; overflows may snag pad edge
Bottom Line: A near-essential daily wipe tool for glass aquariums; quick, splash-free and thoughtfully engineered to self-rescue if it slips.
4. AQUANEAT Fish Tank Cleaning Tools, Aquarium Double Sided Sponge Brush, Algae Scraper Cleaner with Long Handle
Overview: AQUANEAT’s Double-Sided Sponge Brush is a 12½-inch handheld scraper designed for quick algae swipe-downs on glass tanks, pairing a coarse scrub face with a softer polishing side.
What Makes It Stand Out: The aggressively coarse green pad rips through spot algae in one pass, while the hole-punched handle hangs neatly on a hook, drying fast to deter odor.
Value for Money: $5.89 is impulse-buy territory; even if you replace it yearly, annual cleaning cost is still under six bucks.
Strengths and Weaknesses:
– Long reach keeps hands dry on tanks up to 18 in deep
– Plastic spine flexes under heavy pressure; avoid leaning in for stubborn coraline
– Explicitly not for acrylic—scratches guaranteed
Bottom Line: Cheap, cheerful and effective for routine glass maintenance; just temper force and rinse pad often to avoid grit scratches.
5. Aquarium Cleaning Tool Set, Fish Tank Cleaning 6-in-1 Set with Nets, Sponge Brush, Plant Fork, Scraper, Rake
Overview: This 6-in-1 Cleaning Set equips keepers with interchangeable heads—nets, scraper, sponge, plant fork and gravel rake—mounted on a telescopic ABS handle that extends 1.8–2.6 ft.
What Makes It Stand Out: Twist-lock collars let you swap tools mid-task without setting the pole down; ideal when you’re skimming fry, then immediately scraping algae in tall tanks.
Value for Money: Ten dollars nets six dedicated implements, undercutting competitors that sell heads separately and nixing the need for multiple short handles.
Strengths and Weaknesses:
– Lightweight yet stiff enough for 55 gal depth; plastic resists rust in brackish setups
– ABS threads can cross-strip if overtightened—hand-tight only
– Plant fork prongs are thin; heavy root tabs may bend them
Bottom Line: An affordable, space-saving maintenance arsenal for small to medium freshwater or saltwater tanks—just treat threads gently and it’ll last seasons.
6. Amviner Aquarium Glass Cleaner, 7 in 1 Algae Remover for Fish Tank, Aquarium Cleaning Kit with Long Handle, Aquarium Net, Algae Scraper, Sponge Brush
Overview: Amviner’s 7-in-1 kit is the Swiss-army knife of budget aquarium maintenance: one extendable 35-inch wand accepts seven clip-on heads—scraper, net, right-angle sponge, tube brush, gravel rake, and two small accessories—so you can swap chores without ever rolling up your sleeve.
What Makes It Stand Out: Nothing else under eight dollars gives you this many dedicated heads plus true deep-tank reach; the tiny hook and tube brush are bonuses rarely seen in value bundles.
Value for Money: At $1.14 per tool, it’s disposable-tool cheap yet sturdy enough for weekly use; buying the pieces separately would easily triple the price.
Strengths and Weaknesses: Heads pop on/off in seconds, the foam sponge pivots into corners, and the handle stays rigid when fully extended. Plastic threads can strip if overtightened, and the scraper blade is acrylic—fine for glass but may scratch acrylic walls if you bear down.
Bottom Line: A perfect first kit for small-to-medium tanks; keep a spare blade handy and you’ll clean for months without getting wet.
7. AQUANEAT Aquarium Cleaning Tools, Fish Tank Cleaner Kit with Adjustable Long Handle, 5 in 1 Set Including Fish Net, Algae Scraper
Overview: AQUANEAT strips the toolkit to five essentials—telescopic handle, net, stainless scraper, gravel rake, and flat sponge—delivering no-frills cleaning for tanks up to 32.5 inches deep.
What Makes It Stand Out: The metal scraper head is the star; it lifts calcified coraline that plastic blades only polish, and the telescopic lock doesn’t collapse mid-stroke.
Value for Money: Eight ninety-eight lands you professional-grade scraping power and a handle that feels twice the price—cheap enough to replace annually.
Strengths and Weaknesses: Stainless blade swaps fast, sponge is coarse on one side for scrubbing and soft on the other for polishing, and the rake’s tines are spaced to grab debris without trapping gravel. Only five heads, no corner brush, and the foam can delaminate after heavy bleach dips.
Bottom Line: If algae is your arch-nemesis, this is the sub-$9 weapon to buy; just add a dedicated corner sponge and you’re set.
8. UPETTOOLS Aquarium Clean Tool 6 in 1 Fish Tank Cleaning Kit Algae Scraper Scrubber Pad Adjustable Long Handle Fish Tank Brush Cleaner Set
Overview: UPETTOOLS goes long—3.2 feet of snap-together ABS sections—then loads six rugged heads, including a 180° swiveling corner sponge that actually reaches rectangular seams.
What Makes It Stand Out: You can service a 150-gallon tall without a step stool; the anti-rust ABS still feels premium, and the buckle joints never twist loose underwater.
Value for Money: At $23.99 it’s triple the cheap kits, but the modularity and replaceable segments mean you’ll own it for years instead of months.
Strengths and Weaknesses: Handle extends one-handed, scraper blade is reversible, and every head floats if dropped. The plastic threads are fine-machined—cross-thread once and the section is trash; storage bag isn’t included.
Bottom Line: Buy this once if you run deep or multiple tanks; the reach and durability justify every extra penny.
9. Laifoo 5ft Aquarium Siphon Vacuum Cleaner for Fish Tank Cleaning Gravel & Sand
Overview: Laifoo’s 5-foot siphon is a single-purpose specialist: squeeze the bulb a few times and gravity pulls mulm, poop, and cloudiness down the kink-proof hose while the sinkable strainer keeps gravel—and fry—where they belong.
What Makes It Stand Out: The priming bulb never needs mouth-siphoning, and the detachable filter screen swaps for a micron sock when you polish water after a rescape.
Value for Money: Under fifteen dollars you get a 5-ft hose and lifetime priming bulb; comparable starters sell the bulb alone for ten.
Strengths and Weaknesses: Starts flow in seconds, clear hose lets you see outgoing water, and the tube’s weight keeps it planted. Hose memory means you’ll fight coils the first few uses, and the 1-inch diameter is slow on tanks over 55 gal.
Bottom Line: Essential for gravel vac disciples; pair with a bucket and you’ll finish water changes dry-handed and drama-free.
10. DaToo Aquarium Mini Magnetic Scrubber Scraper Small Fish Tank Cleaner Nano Glass Aquarium Cleaning Tools with Super Strong Magnet
Overview: DaToo’s pocket-size magnetic scrubber is built for nano tanks up to 8 mm glass: an N38 neodymium core delivers 2600 GS of force, letting the exterior handle drag the inner scrubber through algae films without you dipping a finger.
What Makes It Stand Out: It’s the strongest mini magnet on the market—2–3× the grip of generics—and the dual-texture pad flips from soft wipe to abrasive scour without changing pieces.
Value for Money: $5.92 buys a year of daily wipe-downs; the magnetism never fades, and the ABS shell survives salt creep that dissolves cheaper knock-offs.
Strengths and Weaknesses: Glides smoothly, corners well in curved bowls, and never scratches when used wet. Strong magnet can pinch fingers if allowed to slam closed, and it’s too petite for panes wider than 4 inches at a pass.
Bottom Line: The perfect desktop-tank companion—keep it stuck to the stand and give glass a five-second swipe every feed; your nano stays Instagram-ready for the price of a coffee.
Algae-Eating Giants: Pleco Mechanics and Myths
Armored catfish from the Hypostomus, Pterygoplichthys and Glyptoperichthys complexes are the first name most hobbyists blurt out when someone says “algae-eater.” Their trademark sucker mouths rasp diatoms and bacterial films off driftwood, rocks and glass with industrial efficiency, but that superpower comes with equally industrial bioload. Expect diet-switching as they mature: juveniles scrape algae, while 8-inch-plus adults crave protein-rich foods and may abandon “green burgers” entirely if you don’t supply sinking wafers, zucchini rounds, and occasional frozen bloodworms. Provide oxygen-rich water with at least 1.5× turnover per hour, offer smooth-surface caves to prevent skin scrapes, and remember that a foot-long pleco can produce as much waste as three similarly sized tetras—plan filtration accordingly.
Dwarf Otocinclus: The Nano Algae Eradicators
Otocinclus spp. rarely exceed 5 cm, making them perfect for shallow rimless tanks where a full-grown pleco would act like a couch in a broom closet. Wild oto shoals number in the hundreds, so replicate that confidence-inspiring crowd by keeping no fewer than six—preferably eight to ten—in a 60-liter system. Their gut microbiome is specialized for soft green algae and diatom films; brush-type or black beard algae is literally indigestible and can starve them. Supplement with blanched spinach, mulberry leaves, and Repashy gel every 48 hours, especially in tanks under six months old where biofilm is still establishing. Always float plants or add catappa leaves; these little catfish are oxygen-sensitive and suffer in bright, naked water.
Amano Shrimp: The Algae-Eating Powerhouses Unsung
Caridina multidentata is technically not a fish, but no “clean-up crew” conversation is complete without them. A gang of eight adult Amanos can strip a 90-liter aquascape of thread algae overnight, courtesy of appendages that work like underwater combine harvesters. They fearlessly scale hairgrass, penetrate deep into moss carpets, and even nibble the outer layers of staghorn algae (softening it so slower fish can finish the job). Keep mineral content above 4° dKH to prevent exoskeleton molt failures, dose iodine-rich foods monthly, and avoid loaches or large cichlids that treat shrimp as drive-thru snacks. In peaceful communities, expect a three-year working life if nitrate stays sub-20 ppm.
Siamese Algae Eaters: The True BBA Controller
Crossocheilus langei is the only species consistently proven to eat black beard algae at all life stages, yet 90% of hobbyists still leave the store with flying foxes or false SAEs that refuse the stuff. True SAE sports a ragged mouth barbel, smooth belly that lies flat on leaves, and an anal fin that’s transparent to the root. Buy juveniles in groups of five—schooling encourages grazing—then provide high-flow areas rich in dissolved oxygen. They slow down after 18 months, so rotate new recruits every two years to maintain algae pressure. Supplementary menu: sinking spirulina pellets, blanched okra, and the occasional protein treat to prevent emaciation in mature fish.
Hillstream Loaches: Algae Grazers for High-Flow Setups
Beaufortia, Sewellia and Gastromyzon spp. are the insect-larvae-gulping, aufwuchs-scraping equivalents of underwater geckos. Their sucker-disc pectorals cling to rocks while torrents rush overhead, allowing them to Hoover up diatom mats and cyanobacteria films that other fish can’t reach. Recreate that habitat with a 10× turnover powerhead, 24-hour dissolved oxygen of 8 mg/L or higher, and rounded river stones at varied angles. Acceptable temperature band is narrower (20–24 °C) than most community staples, so pair with white-cloud minnows or zebra danios rather than neons. Fine sand prevents belly lesions; avoid jagged blasted quartz that can slice their sensitive oral disc.
Flagtail Corys: Continuous Substrate Shifters
Corydoras osteocarus and C. pastazensis (often sold as “flagtail” corys) sift fine sand through their gill rakers 12 hours a day, extracting uneaten pellets, blackworm fragments, and plant debris. The perpetual vacuuming action prevents anaerobic pockets and keeps detritus suspended for mechanical filters to trap. Use 0.5–1 mm sand depth of 2–3 cm; deeper beds exhaust them and foster dangerous nitrogen bubbles. Keep shoals bigger than barista work crews—think ten minimum—to see this sand-pipeline behavior. Provide calcaroous additives or wonder-shells because acidic pH below 6.2 dissolves their barbels, shortening janitorial tenure.
Farlowella Twig Catfish: Plant-Safe Algae Specialists
Farlowella vittata resembles an alder twig swaying in current, a disguise that doubles as a perch for systematic leaf-scraping. Their rasping pads target the thin film algae on Anubias, Amazon sword, and even moss fronds without shredding plant tissue. These catfish insist on tannin-rich soft water (pH 5.5-7.0, GH <6°) and detest nitrate >15 ppm; a KH under 3° helps maintain mildly acidic conditions if CO₂ injection pushes pH downward. Feed after lights-out with chlorella wafers fastened to a tiny stone; competition from boisterous bottom feeders stresses them into starvation.
Bristlenose “Ancistrus” Varieties: Compact Pleco Alternatives
Ancistrus spp. stay under 13 cm yet inherit the pleco work ethic, polishing driftwood and aquarium glass without rearranging your aquascape like their larger cousins. Males grow facial bristles—odontodes—used for territorial skirmishes and impressive breeding caverns. Provide a PVC pipe or two; caves entice spawning and reward you with fry that graze 200% more algae per gram of body weight than adults. Strive for 2:1 vegetable-to-protein ratio: zucchini, canned green beans, and blanched peas should outrank bloodworms. Regular fibre prevents the buoyancy disorders that unbalanced pleco-diets often trigger.
Florida Flagfish: The Aggressive Hair Algae Mower
Jordanella floridae is technically a killifish, but males develop chisel-shaped mouths purpose-built for yanking filamentous algae like an underwater weed-whacker. Their tenacity shines in patio ponds and desktop Walstad tanks where hair algae drapes everything, yet their territorial streak rivals many cichlids. Pair one male with two or three females in 60 liters or larger; floating plants diffuse light, temper aggression, and foster algae they relish spawning in. Cooler temps (18–24 °C) prolong life and reduce metabolic waste—perfect in unheated tanks with year-round ambient room temperatures.
Rabbit Snails: Decorative Detritus Recyclers
Tylomelania spp. glide across sand on an oversized muscular “foot,” vacuuming fish waste, uneaten food and fragmented plant debris. Their slow metabolism means minimal bioload per gram, but a herd of eight can still dent nitrate in a 120-liter setup stocked with messy cichlid fry. Calcium-rich water (GH 8–12°, pH 7.4+) is non-negotiable for shell density; weekly wonder-shell or crushed coral pouches prevent pitting. Temperatures above 27 °C shorten life to 18 months, so avoid discus-level heat; instead pair with rainbowfish or livebearers in the 24–26 °C sweet spot.
Matching Cleaner Species to Your Aquarium Setup
The best janitor fish isn’t necessarily the most prolific algae-eater; it’s the one whose environmental needs overlap with your existing stock. Map water parameters, temperature range, flow rate, substrate texture and bioload before purchase. A South-American blackwater biotope housing cardinal tetras at 5.5 pH pairs naturally with Farlowella and Otocinclus, while a Malawi mbuna tank at 8.2 pH begs for Ancistrus and large snails that thrive in hard carbonate-rich water. Meshing cleaner compatibility avoids the all-too-common sight of new plecos gasping in soft-water discus quarters or Hillstream loaches languishing in low-flow betta cubes.
Bioload Balance: Keeping Waste Producers Without Overloading Filtration
“Cleaner” is not code for “invisible.” Every cleaner fish still excretes ammonia; some (hello, adult common pleco) rival Oscars in the poop department. Calculate inch-per-gallon rules against adult—not juvenile—body mass, then multiply by 1.5 to quantify real bioload. Aim for biological media volume of at least 5% tank volume for heavy-grazer setups, and clean mechanical sponges weekly to prevent detritus slurry from fueling nitrates faster than algae crews can harvest them. Use a feed-to-protein ratio diary for the first month; any spike above 20 ppm nitrate signals either chronic overfeeding or a cleaner crew member masquerading as a waste factory.
Water Parameters: GH, KH, pH, and Temperature Considerations
Algae-eating success is 50% hunger, 50% chemistry. Hard water diatom blooms charm Otocinclus; acidic, mineral-poor water encourages weak cell-wall algae that Siamese algae eaters devour. Hillstream loaches require high dissolved oxygen obtainable only with cooler water and surface agitation. Measure GH/KH monthly—rookie mistake is chasing pH alone while ignoring mineral buffering that invertebrates require for exoskeleton or shell integrity. Automated top-off units can lower GH over time; remineralize RO water to target species-specific ranges rather than chasing universal values.
Dietary Overlap: Preventing Starvation in Specialized Feeders
A clean-looking tank can be a famine for grazers when algae thin out after week six. Diagnosing starvation is tricky: sunken bellies in Otocinclus, shortened spikes on Amano rostrums, or discolored radula marks in snails. Rotate feeding stations: blanched veggie clips near the glass for nocturnal plecos, Repashy cubes smeared onto rocks for Hillstream loaches, and powdered spirulina delivered via pipette into moss thickets where dwarf shrimp hide. Schedule at least two “target feedings” per week specifically for cleaners rather than relying solely on leftovers.
Introducing New Cleaning Fish: Quarantine and Disease Prevention
Wild-caught Otocinclus and Farlowella frequently carry intestinal flagellates; Hillstream loaches often harbor skin flukes that explode in standard tropical temps. Set up a bare-bottom 10-gallon quarantine on an aged sponge filter, dose 2 ppt aquarium salt for first week (safe for shrimp and most catfish), and perform daily 30% water changes. Observe for sunken eyes, excess slime coat, or refusal to adhere to hardscape—early indicators of protozoan storms. Finish with a 14-day metronidazole or praziquantel protocol before moving the new crew into display. This step alone eliminates 90% of “mysterious die-off” stories that plague cleaner communities.
Long-Term Care and Life Expectancy of Janitor Species
A six-dollar Otocinclus can live five years; a $3 Amano can chug along for three, and a bristlenose tops ten if kept cool and fiber-fed. Life expectancy directly relates to diet variety and nitrate discipline below 15 ppm. Replace Hillstream loaches every 3–4 years or they become algae-blind, and introduce juvenile Siamese algae eaters seasonally to keep BBA browsing at peak efficiency. Maintain a diary of purchase dates; when your “original cleaning crew” hits three-year anniversaries, supplement—not necessarily replace—new recruits to bridge workload gaps before elder janitors retire to quieter corners of the tank.
Combining Species for Maximum Algae and Waste Control
Layering grazers by niche creates a 3-D sanitation network: surface film (Amanos), plant leaves (SAE), driftwood (bristlenose), substrate (corys), and mid-water detritus (flagfish). Stock in waves, observe for two weeks, then adjust numbers rather than dumping six species on the same afternoon. Example pairing in a 200-liter 24 °C community: 10 Amanos, 8 Otocinclus, 3 SAE, 5 flagtail corys, 1 adult bristlenose, plus 5 rabbit snails to sand-polish. This layered “clean-up matrix” often eliminates the weekly glass-scrape chore entirely.
Avoiding Common Pitfalls When Choosing Cleaner Fish
Impulse-buying a common pleco for a 60-liter, dismissing mineral needs of inverts, mixing cold-water Hillstream loaches with 28 °C angelfish, or believing that any algae-eater will “eat everything” are the four horsemen of janitor apocalypse. Research adult size, social structure, water chemistry, and dietary drift before pressing “add to cart.” Treat cleaners like prized display fish—because algae does not respect shortcuts.
Frequently Asked Questions
Q1: Will cleaner fish completely eliminate the need for manual glass scrubbing?
A: They dramatically reduce it, but ultra-soft scrapes every month or two remain good practice for corners and silicone seams.
Q2: How many Otocinclus should I keep in a 90-liter planted aquarium?
A: Aim for eight to ten; smaller groups stress easily, leading to starvation and premature death.
Q3: Do Siamese algae eaters eat black beard algae in its tough, mature state?
A: Yes, true Crossocheilus langei will graze mature BBA, particularly when introduced as juveniles and kept slightly hungry.
Q4: Can I keep Hillstream loaches in a standard tropical 26 °C tank?
A: No, long-term temps above 24 °C reduce oxygen, shorten life, and invite skin flukes; choose cooler 20–23 °C setups instead.
Q5: Are Amano shrimp safe with bettas?
A: Generally yes, but provide moss thickets for molting refuge, and introduce shrimp first so bettas don’t claim the entire territory.
Q6: Why are my bristlenose plecos developing hollow-looking bellies?
A: Hollow bellies signal inadequate plant fibre; add zucchini, canned green beans, or specialty herbivore wafers at least three times per week.
Q7: What’s the best substrate depth for flagtail corys?
A: Keep fine 0.5–1 mm sand at 2–3 cm; too deep and they strain their barbels, too shallow and they can’t sift efficiently.
Q8: How can I raise GH safely for snails in soft-water aquascapes?
A: Add small mesh bags of crushed coral or aragonite in the filter, or dose commercial GH booster to 6–8° dGH while monitoring pH.
Q9: Do cleaner fish replace regular filter maintenance?
A: Absolutely not; filters process ammonia and nitrite that even the busiest shrimp can’t touch—clean mechanical media weekly regardless.
Q10: Can I dose liquid carbon (glutaraldehyde) with algae-eating fish?
A: Most tolerate recommended doses, but Hillstream loaches and Otocinclus are sensitive—start at half dose and observe respiration and color for 48 hours.