Tomarow i am planning on doing my first water change :D . I just got done mixing my saltwater and it reads 1.023. I made this thread to ask about what i do about my filter. I have a fluval 403 canister filter, and i want to know how to clean it and the media. If u fellas could answer these questions for me i would be very aprecciative p.s i heard not to clean all 3 of my filter media at the same time what do i do? take one out cleane it put it back it let the filter go for a while then do it again with another one?? Any other tips that i need to know during water changes would be fantastic thanks.