Who told you to give it crickets?? Where on earth would a water turtle catch a cricket in the wild??Crickets normally avoid water in the wild so it is not a natural food source for your turtle. And at hatchling size it would not be eating fish Even in the wild. It would be eating plant material and any rotting meat it could find in the water. So continue with either the pellets or even flake fish food as already mentioned to get it started, but get it on pellets as soon as possible. The live food will come later, after you get it established and growing. And it would never eat at that time of the day and any pellets or flake you put in there at that time is just a waste.by the time your turtle is ready to eat the food is all nasty, they like the pellets(sticks) fresh for some reason, not soggy, at least it always seemed that way with all mine, and ive raised over 50.Turtles are nocturnal so give it a chance to wake up in the morning before feeding. In the wild they would get warmed up first then eat and then bask under the sun to help digest there food.
Raising and Breeding reptiles for 28yrs