I have an Aquaclear filter and I find that debris collected from the water seems to pass through the sponge section very easily. I have added filter floss and it seems to collect alot more poop/food. Does anyone else use floss in their Aquaclear as well and how much do you use/how often do you change it? I'm afraid of upsetting the good bacteria balance by changing the floss but it gets grungy very fast.