Posted: Wed Dec 20, 2006 8:49 pm
I have a stock tank that's to one side of a window with a southern exposure, and a 20-gallon tank that's in line with the window but further into the room. Both do get sunlight exposure during the afternoon. In the winter, there is no problem with the temp getting too warm---the water temps stay at 71-72F even with the sunlight shining on the tanks. (In the summer, it would be a different story.)
The lighting is beautiful, and my turtles seem to really like it, but they get no UVB benefits from the sun through the window. They still have UVB lights.
The tanks do get algae. The algae only forms on the sides of the tanks and objects in it, but the water remains clear. I just leave the algae in the stock tank, since it looks really nice and natural. I clean the algae from the walls of the regular tank when it gets bad, but this is because it doesn't look very nice on glass.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-