Posted: Mon Nov 30, 2009 1:08 pm
Idealy you want as much water as possible. Remember, theyre aquatic turtles not land turtles. More water = better.
As far as water changes, typically WITH a filter - you should never change 100% of water.
WITHOUT a filter, make sure you let the water stand by itself to rid of any chlorine in it, or use de-chlorinate. Depending how much water is in there, i'd change it every few days.