A slider can be a pet, they often do great in captivity. A snapper is not a pet and don't do well in fish tanks.
I am highly experienced in reptile and amphibian care, I've been a breeder for years. I kept a snapper short term as an alternative to it just being killed as it was in a fish pond killing foot long catfish. In healthy circumstances these guys grow fast and big. The fact yours is still smaller is likely a sign its being stunted, unsurprisingly. Again I'll mention this turtle is entirely loosing any chance of learning what is necessary for a wild turtle to survive as well as being taught not to be fearful of humans. Any wildlife rehabilitation services I've ever heard of would highly advise against this so I question the advise your receiving.
This is not how actual wildlife rehabilitation works, this is pet keeping. Its selfish.
There is no physical way for you to provide adequate housing for this beast of a turtle its whole life and your setting it up to not be able to survive in the wild either. I'm done, I know none of this will change your mind. Have fun with the pet.
Referring to the accusation of pet keeping and my selfishness, I will remind you that I did not go out into the wild and pluck this turtle from its natural habitat. This turtle was confiscated from a young boy in my classroom that was carrying it around in his book bag and pocket. It was near death, which is clearly evident in the initial pictures I posted. If the turtle is stunted, it is by no means any of my doing. I am simply caring for it until it is strong enough to survive....in the wild.
For the sake of the forum and its readers I will say that I do not condone keeping such an animal in captivity solely for the purpose of enjoyment. That is selfish. While I am enjoying watching it regain its health, that is not my purpose of keeping it.
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