Try searching 'fish load' on Google or your favourite search engine.
The bad old formula was 1 inch of fish per gallon, but well, imagine putting a 24" arowana in a 24 gallon tank.![]()
Personally, better not to overload in case of power outage. If the power cuts out just after you leave for work, and assuming no one is at home, that's about 8+hrs (assuming you work typical hours) without filtration. A high fishload tank will definitely see casualties.
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