Estimate a target pump-flow range through an aquarium chiller.
Open live calculator →A 300 litre system at 3 turnovers per hour needs about 900 litres per hour nominal flow.
Stay inside the chiller manufacturer's required flow range.
Translate net system volume and a target turnover into nominal circulation for early chiller-loop planning.
The live tool updates immediately and shows the result in the units commonly used by aquarium keepers around the world.
The chiller manufacturer's flow range takes priority.
Plumbing head and fittings reduce real flow.
Cooling capacity must be sized separately for heat load and room conditions.
Stay inside the manufacturer's specified range—too slow risks freezing and inefficiency, too fast means water passes without shedding heat. The calculator's turnover estimate is for early planning only.
Only if summer water temperatures exceed what your livestock tolerates—typically a concern for reef tanks, cold-water species, or hot climates. Fans and evaporative cooling handle mild cases far more cheaply.
A dedicated feed pump or a tee from the return line both work; what matters is a stable, measurable flow inside the specified range, unaffected by filter media clogging.