Top 7 Tank Cleaning Fish (And More!) to Keep Your Aquarium Clean Naturally
Keeping an aquarium clean doesn’t have to be hard work—especially when nature gives you a helping hand. Tank cleaning fish can play a big role in maintaining a healthy, algae-free tank while adding personality and variety to your underwater world.
today we’ll highlight 7 of the best tank cleaning fish and invertebrates, explain what makes a great cleaner, and share tips to help you build a balanced, self-sustaining ecosystem. Whether you're a beginner or a long-time hobbyist, these tank helpers can save you time and effort.
1. Bristlenose Pleco
One of the best-known tank cleaning fish, the Bristlenose Pleco is a favourite among aquarists. These hardy fish are excellent algae eaters and are perfect for tanks over 80 litres. Unlike the larger Common Pleco, the Bristlenose stays small (around 10–15cm), making it suitable for most community tanks.
In the wild, Bristlenose Plecos are found in the Amazon Basin, where they cling to driftwood and graze on biofilm and algae. Mimic their natural habitat by including driftwood and hiding spots, along with a steady supply of algae wafers or blanched vegetables.
2. Corydoras Catfish
Corydoras are peaceful, bottom-dwelling tank cleaning fish that do a great job picking up leftover food. They prefer to live in groups of six or more and enjoy sand or fine gravel substrates where they can safely sift for food.
Native to slow-moving South American rivers, they’re accustomed to well-oxygenated, clean water. They won’t eat algae, but they help prevent water quality issues by consuming waste before it decays. Keep them happy with sinking pellets, frozen bloodworms, and lots of tank mates!
3. Siamese Algae Eater
If you’re looking for a tank cleaning fish that tackles stubborn types of algae—especially black beard algae—the Siamese Algae Eater is a top choice. These energetic swimmers are also great for mid-sized to large tanks.
In the wild, they’re found in fast-flowing rivers across Southeast Asia. To replicate their natural environment, provide plenty of open space for swimming, along with rocks and driftwood to graze on.
4. Otocinclus Catfish
Otocinclus, or “Otos,” are small but mighty tank cleaning fish. They're known for their algae-eating abilities and peaceful nature. These fish are ideal for planted tanks under 100 litres and do best in schools of six or more.
They come from streams and rivers in South America and thrive in clean, well-maintained aquariums with plenty of plant matter and smooth surfaces to graze on. Supplement their diet with algae wafers and blanched spinach.
5. Amano Shrimp and Other Cleaner Shrimp
Shrimp aren’t technically tank cleaning fish, but they are some of the most effective and entertaining cleaners you can add. Amano Shrimp, in particular, are prized for their voracious appetite for algae and leftover food. They’re safe for peaceful community tanks and help prevent buildup in hard-to-reach places.
In the wild, Amano Shrimp are found in freshwater rivers in Japan and Taiwan. They enjoy heavily planted aquariums with moss and driftwood. Other great cleaning shrimp include Cherry Shrimp and Ghost Shrimp.
Keep your shrimp happy with sinking pellets, algae wafers, and occasional treats like zucchini or cucumber slices. Be sure to avoid copper-based medications, which are toxic to shrimp.
6. Mystery Snails and Nerite Snails
Snails are underrated tank cleaners that can make a big difference, especially in planted or peaceful tanks. Nerite Snails are excellent algae eaters and won’t reproduce in freshwater, making them a mess-free option. Mystery Snails also help clean up detritus, though they can breed if you have both males and females.
Both types are found in tropical and subtropical waters, grazing on soft algae growing on plants, rocks, and glass. In your tank, provide calcium-rich water and smooth surfaces. They’ll feed on leftover food, algae wafers, and blanched veggies.
7. Hillstream Loach
This unique-looking tank cleaning fish resembles a miniature stingray and is perfect for algae control in cooler, fast-flowing tanks. The Hillstream Loach does well in well-oxygenated setups with lots of rocks, caves, and strong water flow.
Found in the rocky rivers of China and Southeast Asia, these fish feed on biofilm, algae, and micro-organisms in the wild. In captivity, provide algae wafers and a mature tank with established surfaces for grazing.
What Makes a Good Tank Cleaner?
When choosing tank cleaning fish, there are a few traits to look for:
Algae-Eating Ability: Some species prefer different types of algae. Consider your tank’s needs.
Tank Compatibility: Choose fish that suit your tank size and water parameters (temperature, pH, hardness).
Temperament: Peaceful species are ideal for most community tanks.
Size: Make sure the cleaner won't outgrow your tank or overcrowd your fish.
Some fish may be excellent cleaners but become aggressive or destructive if placed in the wrong setup. Always research each species before buying.
Tips for Keeping Your Tank Cleaning Fish Healthy
Tank cleaning fish need more than just algae to thrive. Here are some key care tips:
Supplement Their Diet: Most cleaners need extra food like algae wafers, sinking pellets, or blanched vegetables.
Maintain Good Water Quality: Stable conditions are essential, especially for sensitive species like Otos or shrimp.
Avoid Overstocking: Overcrowded tanks create stress and worsen water quality.
Continue Regular Maintenance: Don’t rely solely on fish. You’ll still need to clean filters, vacuum gravel, and perform water changes.
Think of your cleaners as assistants—not replacements—for good tank care.
Do Tank Cleaning Fish Really Clean the Whole Tank?
It’s a common myth that tank cleaning fish will eliminate the need for maintenance. In reality, these fish help manage algae and waste—but they can’t remove all toxins or debris.
They Don’t Replace Water Changes: Algae eaters don’t remove nitrates or ammonia. You still need to test water regularly and perform partial water changes.
They Need Support: Without enough algae or supplements, they may starve or become unhealthy.
They Clean Specific Areas: Some clean glass, others focus on gravel or plants. No single fish can cover everything.
When used as part of a regular cleaning routine, however, they’re extremely helpful.
How to Choose the Right Tank Cleaning Fish for Your Aquarium
Matching the right cleaner to your tank involves more than picking the most popular fish online.
Consider Tank Size and Conditions: A Bristlenose Pleco might be too big for a nano tank, while shrimp may need stable, low-traffic tanks.
Look at Temperament: Avoid mixing aggressive or territorial species with peaceful cleaners.
Ask Local Experts: At Toni’s Pet Station, we can help you choose fish that match your exact setup—whether it’s a 10L nano or a large planted tank.
Local advice is always better than generic online suggestions. We know your water, your climate, and which fish thrive in our area.
Build a Balanced Tank with the Right Helpers
Tank cleaning fish (and invertebrates!) are great allies in your aquarium maintenance routine. They help control algae, eat leftover food, and keep your tank looking fresh.
But remember: no fish can replace regular care. They’re best used as part of a balanced ecosystem supported by good food, proper filtration, and scheduled maintenance.
✅ Want to build a cleaner, healthier tank? ✅ Visit Toni’s Pet Station in Ningi for expert advice, tank supplies, and a range of helpful tank cleaning fish and invertebrates.