The best filters for a nano tank in 2026
Nano tanks need gentle, adjustable flow and a filter that doesn't dominate the aquascape. From a tiny internal for shrimp to a compact canister for tidy pipework, these keep small tanks stable without a raging current.
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Frequently asked questions
What filter is best for a shrimp nano?
Shrimp tanks want low flow and no way for shrimplets to be sucked in. A small sponge-style internal like the Eheim miniUP is ideal — it's gentle, biological, and the sponge intake protects babies. If you use a stronger filter, fit a sponge pre-filter over the intake.
Can I use a big filter on a small tank?
You can, if the flow is adjustable — a canister like the Fluval 207 turned down and fitted with a spray bar or lily pipe works well on a heavily planted 60 L. The risk is a small tank becoming a washing machine, which stresses fish and uproots plants, so throttle the return.
How often should I clean a nano filter?
Rinse the mechanical media in old tank water every couple of weeks, or when flow noticeably drops. Never clean all the media at once or under tap water — chlorine and a full strip-down kill the beneficial bacteria and can trigger an ammonia spike, which is far more dangerous in a small volume.
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