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- Sized by output in L/min or L/hour â match to reservoir volume (aim for full turnover every 30â60 min)
- Use air stones (diffusers) to break air into fine bubbles â finer bubbles = greater surface area = more DO transfer
- Multiple air stones improve coverage in large reservoirs
- Air pump failure is a leading cause of acute root rot â always keep a spare
- Elevate the pump above the reservoir water line to prevent back-siphon if power is cut
- Noise can be reduced with rubber feet or foam mounting pads