If its a pond turtle why are you posting this on the Mud/Musk forum? You would probably have better luck in the General Turtle Forum. Anyway, a 30gal will not be big enough for a "pond turtle". I would say a 55gal would be the smallest considering we dont know what kind of turtle it is yet. Personally I like natural setups. So, I would throw in some natural colored gravel or river rock. Then some aquatic plants like Anacharis. You will need a filter and a heater. I would reccomend a canister filter like a FilStar or a Magnum. For a heater I would go for a Ebo-Jager or a Tronic, about 150 watts. Then you will need to make a basking area. You can pretty much use anything you want there. They have commercial basking areas or you can make your own out of a log or whatever. You will need a heatlamp over the basking area, and ideally a flourecent light over the water area with a good UVB bulb. For more info go to www.AustinsTurtlePage.com
Chris
-----
Hey whats up, I'm Chris and I currently have 1.0 Softy, 0.0.1 Midland Painted, 1.0 Bearded Dragon