How do I clean my filter and how often should I clean my filter?

I have a 30 gallon tank that has 10 Comet Goldfish in it and yes I know everything on why and how that is too many and I am doing everything I can but how do I clean my filter and how often should I? Also every other day I clean the bottom with a Siphon and replace 50% of the water. I have a Aqua Clear 30 filter.

Your filter typically only needs cleaned when it becomes dirty, however you have a bit of an overstock here and may require more cleanings than typical. The answer is still the same, when you see it clogging or dirty, simply rinse the carbon in the waste water, wipe out the filter and replace.

While each comet does not require 20 gallons of water if they are still small they are fine for now. You are right they will need rehoused.

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