how often to change the filter cartridges on a fish tank?
how often should i change my fish tank filter cartridges on a 20 gallon tank. Also,I have ten community fish. thanks plz answer quick <3
depends on the filter - carbon filter every month, foam filter every 3 months, and any bio-media you have should never be replaced. you should also periodically rinse the media, but only rinse it in tank water, tap water will kill the bacteria which makes