I recomend some changes in the way your keeping it, first its florida cooter Pseudemys floridana, your going to take out the rocks and replace them with a chunk of cork or chunk of mopany wood, that makes a better island and its safer then rocks. Also your going to ad as well some duck weed and elodea. It would be good as well to increase the water level to about 6 cm, as baby turtles feal safer and eat better in deeperish water.