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Hydor Koralia Nano 565 Circulation Pump
Gentle, broad flow sized right for small tanks
- Compact magnet-suction mount fits tight nano and pico builds
- Wide-angle output spreads flow instead of blasting a jet
- Rated around 565 gallons per hour for small-tank turnover
- Caged propeller helps keep curious fish and shrimp safe
- Tool-free disassembly makes routine cleaning quick
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Pros
- Broad, diffused flow that won't sandstorm a nano
- Tiny footprint hides easily behind rock or equipment
- Magnet mount holds well on thinner aquarium glass
- Simple, reliable design with few failure points
- Easy to pull apart and rinse when flow drops
Cons
- Single fixed speed with no controller option
- Magnet can struggle on very thick rimless glass
- Impeller can buzz briefly until it seats after cleaning
- Flow may be too soft for larger or heavily stocked tanks
At a glance
Gentle, broad flow sized right for small tanks
The Koralia Nano 565 delivers the kind of soft, spread-out current small tanks actually need without turning the substrate into a dust cloud.
- Compact magnet-suction mount fits tight nano and pico builds
- Wide-angle output spreads flow instead of blasting a jet
- Rated around 565 gallons per hour for small-tank turnover
- Caged propeller helps keep curious fish and shrimp safe
- Tool-free disassembly makes routine cleaning quick
Product Specifications
- Flow rate
- ~565 GPH
- Mounting
- Magnet suction
- Flow type
- Wide-angle diffused
- Best tank size
- Nano to ~30 gallons
- Water type
- Fresh or saltwater
- Control
- Single fixed speed
Why we recommend the Hydor Koralia Nano 565
Nano tanks are easy to over-power. Drop in a pump meant for a 50-gallon and you get a jet stream that scours sand, flattens plants, and stresses small fish. The Koralia Nano sidesteps that by pushing a wide, gentle cone of water rather than a focused blast, which is exactly the behavior most small reef and planted tanks benefit from.
Hydor’s caged propeller design has been a hobby staple for years, and the appeal is its simplicity. There’s no electronics to fail, the magnet mount lets you reposition flow in seconds, and the whole unit comes apart by hand for cleaning when buildup eventually slows it down. For shrimp tanks and peaceful community setups, the guard around the prop is reassuring too.
Who it’s for
This is for nano keepers who want better circulation without buying into a controller ecosystem. If you run a small reef and need to eliminate dead spots, or you keep a planted tank and want gentle surface agitation for gas exchange, it fits the bill. Owners of larger or densely aquascaped tanks will likely want a stronger or controllable powerhead instead, but for the small-tank niche it was built for, it’s a sensible, budget-friendly pick.
The Bottom Line
The Koralia Nano 565 delivers the kind of soft, spread-out current small tanks actually need without turning the substrate into a dust cloud. It's a dependable, no-fuss choice for nano reef or planted setups that just want a bit more movement.
View on Amazon →As an Amazon Associate, AquaticRig earns from qualifying purchases.
Frequently Asked Questions
Will this pump be too strong for a nano reef?
Generally no. Its wide-angle output is designed to spread flow gently, which is why it suits nano tanks rather than blasting corals or sand.
Does it work in freshwater planted tanks?
Yes. It's rated for both fresh and saltwater, and the diffused flow is good for surface agitation and gas exchange in planted setups.
How do I aim the flow?
The magnet mount lets you reposition the pump anywhere on the glass and angle it, so you can break up dead spots without remounting hardware.
Is the impeller safe for shrimp?
The propeller sits behind a guard, which reduces risk to shrimp and small fish, though very tiny fry should always be watched around any pump.
How often does it need cleaning?
It varies with your tank, but a rinse every few weeks to a month keeps flow strong; it pulls apart by hand for quick maintenance.