I got him from my friend and he gave me a 30 gallon tank with some gravel for the bottom, a submersible filter, and a regular fish light. I found some granite chunks outside and I washed them off and put them in just under the water so he can sit on it if he wants. He also is always clawing at the back of the tank. I think he wants to get out but I'm not sure. Could somebody help me out on what else I need? I don't have much money, under $100, but I don't want him to suffer because of it.
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