
As for filter replacement, the product is as expected and is the same brand name as my original IF-40 filter. However the filter itself is marked 30-40 gallons and I use it in my 20 gallon tank along with a 20 gallon sponge filter and I think it could filter better. I change 50-60% of the water weekly and there are only 14 fish in this tank and I don't overfeed them, also I have lots of live plants in my tank which also help with the filtering.

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