I would just like to know how big of water changes everyone does. Do you guy think one big water change every few weeks is the way to go? Or smaller ones every week is the way to go? I'm just tring to figuer out what everyone thinks is the best. As of right now I do a 10 to 15 gallon water change every Sunday on my 40 breeder. I thought about changing up and just doing a 5 gallon water change every Sunday. My bioload isn't very high cuse all I have in there are 3 small fish. So lets here it. What do you guys think?