So I leave it in the bag?
I have an all in one tank, so my filtration is 2 overflows at each side which go into like rectangle plastic boxes. About 10inch from top to bottom. 4 inches across. And 3 inches in width. It is separated into 3 parts with 2 plastic dividers. First bit has a mechanical sponge, second part has carbon sponge and last part has phosphate sponge. I DO NOT have like a HOB or canister filter.
Should I replace my carbon with the chemi pure elite?