Originally Posted by
isthatright
http:///forum/post/3201815
it holds 4 bags of carbon, changed my white sponges n couldn't believe the bugs in my canister. next time i'll change my carbon
ISTHATRIGHT, do you use carbon bags in all 4 trays? usually its the just one of the bottom trays you leave the carbon in then the other trays you can use whatever you want. In mine i have carbon, a medical stone that is supposed to keep fish healthy and boost their immune systems, a nitrate remover (only if my levels get high), a phosphate remover, and a bio ceramics for anaerobic bacteria to colonize. also just a tip, usually when you change the white sponge pads you only do them one at a time to reduce the amount of nitrogen decomposing bacteria you are removing. i usually change one so it can repopulate with bacteria colonies, then 2 weeks to 4 weeks later i change the next one. this way you dont remove all of your bacteria living in there and risk having an increase in ammonia levels. hope that helps. gluck!