I have had my red ear slider, Cheeseburger, since May. He currently resides in a 10 gal aquarium (this will be changing soon to a much bigger aquarium as well as the gravel!!) for now. He has a basking area, sun and heat lamps, and a medium sized reptofilter. I just moved around the lights from their usual spots because of algae growing in the tank and yesterday I noticed Cheeseburger breathing funny under water. His tank is cleaned regularly but his filter does need to be changed now. I'm not sure if any of this is a factor, or if this is even an issue, but I thought I would check anyways. Here's a 30 sec. clip of Cheeseburger under water.
http://www.youtube.com/watch?v=2A4YzXraVGs
