Hello again, I was having a look through the other threads about the AquaClear filter, biomax, and foam sponge. I just wanted to clarify a few things to make sure I understand correctly. 1. What I have been reading is that you don't really need to change out any of these for new ones because of the good bacteria that grows on them so people here rinse them out in old tank water. Correct? Once a month, can you rinse all them out in old tank water all at once or is that too much good bacteria loss for the tank (10 gallon)? Must they be rinsed out separately during different water changes? 2. Since the AquaClear biomax stones, how do you know when they've been used past their time or do that never really need to be replaced? Thanks again.