I would agree that most of the waste is probably in the substrate. Because you clean so often most waste is probably just removed, especially if you vacuum
Well the shrimp and plants will be moved over to my 10 gallon I do not mind large water changes ... i am use to my axolotls, They produce a lot of
Can you fit three portions in a medium box?
I wouldn't worry too much. I normally go 3+ weeks (until output seems reduced) before cleaning my sponges. I'm sure that if I were to clean them weekly,
the shrimp may become lunch as well as the plants.you will need to do large water changes once a week.