In a larger aquarium, a single filter often can’t circulate the whole tank — leaving dead spots where debris settles and oxygen drops. A powerhead or wavemaker adds targeted flow, keeping water moving, waste in suspension for the filter to catch, and oxygen levels healthy. This UK guide covers the best powerheads and wavemakers in 2026.
Here are our picks and how to position one.
- A powerhead or wavemaker adds flow larger tanks need to avoid dead spots.
- It keeps waste suspended for the filter to catch and boosts oxygen.
- Cichlids and large community tanks benefit; bettas and angelfish dislike strong flow.
- Position flow to clear dead spots without blasting fish or delicate plants.
When you need extra flow
- Large tanks where one filter can’t reach every corner.
- Cichlid tanks — many cichlids come from fast-flowing waters and appreciate current.
- Tanks with dead spots where debris settles and gunk builds up.
Note that gentle-water fish like bettas and angelfish dislike strong flow.
Our top picks
Best overall — adjustable powerhead. An adjustable powerhead lets you dial flow to the tank and add a directional nozzle.
Best for large tanks — wavemaker. A wavemaker flow pump creates a broad, gentle current ideal for big community and cichlid tanks.
Best controllable — with a controller. A controllable wavemaker lets you set pulse and night modes for natural flow patterns.
How to position it
Aim the flow to eliminate dead spots — often across the surface for gas exchange, or along the back glass to sweep debris toward the filter intake. Avoid pointing it straight at fish or delicate plants. Match the flow to your fish: strong for cichlids and rheophilic species, gentle for long-finned and slow-water fish. Pair with a good filter.
Frequently asked questions
Do I need a powerhead or wavemaker?
In larger tanks where one filter can't circulate every corner, yes — a powerhead or wavemaker clears dead spots, keeps waste suspended for the filter, and boosts oxygen. Small tanks with good filter flow usually don't need one.
What's the difference between a powerhead and a wavemaker?
A powerhead produces a focused jet of flow, useful for driving water in a direction, while a wavemaker creates a broader, gentler current across the tank. Wavemakers suit large display tanks; powerheads are more targeted.
Where should I position a wavemaker?
Aim it to eliminate dead spots — often across the surface for gas exchange or along the back glass to sweep debris toward the filter intake — without pointing it directly at fish or delicate plants.
— Jaqline Smalling, FishForever
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