Thank you for your advice I feel so terrible for the way I've botched this, and I will be sure to never do so in the future. I will take all of your advice for the future to the best of my abilities.

However, is there anything I should do at the moment? He is in a small tank with water high enough to comfortably cover him but not enough so he could drown. His color looks the same as it always has, but I don't think he can use his back legs, and he hasn't eaten. Any tips?