jersysman
Aquarium Advice Activist
I noticed a lot of posts that say don't change the gravel in the filter. I have a small 5-gallon tank and a Whisper Economy filter. It uses a biobag as the filter material. It looks like a bag with charcoal in it. What do I do with this? Keep cleaning it with water from the tank? When it comes to replacing it, I will have to replace the whole bag. Won't this destroy my cycle? Any information will be appreciated.