Hello all, My mother bought an aquarium kit that came with a Quiet Flow 30. She cycled with fish and TSS but her fish are doing great. I test her water for her every week and her levels are good so she added a couple more fish. She has yet to change the cartridge (at least she listened on that one) Tonight, I got her a small box of Bio Max and a bag and pretty much jammed it in the space behind where the cartridge goes. My thinking was that she can change the cartridge to her hearts content (because somehow, that is bugging her) and not lose bacteria. The flow doesn't seem to be affected. Will this work out in the long run? I mean with the cartridges? Or should I look to put something else its place? I don't think I can convince her to put anything else that she will have to rinse and reuse (like the bio max). Thoughts?