Lighting & Pumps
Hydor Koralia Powerhead Review: Budget Flow That Actually Works
An overview of the Hydor Koralia, a non-controllable budget powerhead with a wide flow pattern.
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The Hydor Koralia is a simple, non-controllable propeller powerhead and a common budget choice for water movement.
Flow pattern
A propeller powerhead like the Koralia produces a wide, gentle flow rather than a narrow jet.
Placement
A common approach is to place two on opposite sides of the tank so that their flows meet.