I always rinse them, I never change them, in the 3 months my tanks have been setup i never changes cartridges, is this ok?

bryan.olsen;820453; said:the plastic filter cartriges with the carbon on the inside and the blue foam on the other side...i keep those till they rip open , just rinse when they start to slow the water flowing through it , and clean them with a salt solution (like 2 or 3 tablespoons in a 5 gal bucket) then rinse them in tap water before putting them back in.
useful info., never tried that but i will during the next change