If a bacterial colony grows quickly enough that two days of heavy feeding might expand the colony dramatically then it likely shrinks at a similar rate and a couple days of no feeding in the newly set up tank likely initiates an immediate bacterial shrinkage..
Gill waste volume likely fluctuates w/ food intake which would tie back into the concept of bacterial colonies growing and shrinking on a rapid basis and maybe make 1 sponge as useful as three.
Gill waste volume likely fluctuates w/ food intake which would tie back into the concept of bacterial colonies growing and shrinking on a rapid basis and maybe make 1 sponge as useful as three.