thomasina
Aquarium Advice Freak
I have two tanks that are within the correct parameters, and looking food. Yesterday, during the weekly 50% WC, I looked into the filters to clean them up, with tank water, and the one has a bag of charcoal in it. I read, and was told that the charcoal isn't good after a while so take it out. I put 100% cotton batting in it instead of poly batting. This is an Aquaclear 100 filter. Is charcoal really that important after the tank has matured?