Posted: Mon Jun 16, 2008 2:49 am
Algae grows in the presence of light and nutrients in the water. Nutrients for algae and other plants can come from left over food or turtle/fish waste.
Does left over turtle or fish food stay in the water? If so, feeding the turtle in a separate tank or bowl will help, as would netting out any uneaten food as soon as mealtime is over.
If a tank is too small for the size of a turtle, or if the filter isn't strong enough, then waste can build up. Or, it may simply be that the water should be changed more often. Does your boyfriend test water quality (ammonia, nitrite and nitrate)? If there is a buildup of waste it should show up in tests of water quality.
SpotsMama