My RES has started wheezing quite often, he does it mainly when surfacing for some air. He is a little over 6'' long, about three years old, and is overall very active and swims and eats normally, like you wouldn't even think he is sick. He is in a spacious, 120 gallon tank with a water temp. that stays around 78-82 Fahrenheit, with a basking temp. of 85-91 Fahrenheit. He is provided UVB from a Zoo Med Repti Sun 5.0 (linear fluorescent tube, not the coil version) and he gets calcium w/Vitamin D3 and Herptivite regularly (calcium 2 times a week, Herptivite 2 times a week). He also gets a good amount of varied fruits and veggies everyday. His tank is a little dirty but I haven't had time to clean it.
Please help!

