Posted: Thu Sep 29, 2005 7:54 pm
If you have two turtles, one 2.5 inches and one 4 inches, in a 10-gallon tank (way too small, btw) the water is going to get filthy quickly (and if you feed them in the tank, even more so) even if you have the water level high. I'm not familiar with your filter, but if it's inadquate for the size of the tank, it will need frequent cleaning as well, with some of the media replaced. With two turtles, if the filter is small and you have carbon, it will likely need to be replaced more frequently than once a month as well. If you still have the turtles in a 10-gallon, I'd clean the tank and filter once a week (and look for a bigger tank/container).
A bigger tank with more water would give you more options for filters and would extend the time between cleanings and complete water changes.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-