Sana, I went over to another forum, and show them Squirtle's picture, and they said
"Softshells tend to be somewhat more carnivorous than their hard-shelled counterparts. They will still need proper basking with a UVB bulb.

Food offering can include fish, shrimp, and worms (fresh or frozen or freeze dried) live insects (from bait and pet stores) etc."
Sp make sure he gets some meat, okay?