Hello everyone! I need a bit of advice. I very recently received a turtle from a friend who was moving and had no room for the tank. We think he's a 6 year old red slider. We're not sure. He's small, around 4 inches long and 2 inches high. He's some kind of snapping turtle. I've had him for about 2 weeks. His tank is approx 75 gallons. He has a dock and a basking area, a filter with clean bags in it. His tank used to be very dirty with no light but when I adopted him, we cleaned the gravel thoroughly by rinsing it in water, scrubbing the tank with baking soda, washed out the filter with a small bit of dawn (Rinsed thoroughly). So now his tank is very clean and clear. I added a 60 watt basking light while I save up for a halo bulb that contains both uva and uvb. The light he has now only provides heat and uva. It's approx a foot away from the tank. The usual temp of the water ranges from 65 to 75 degrees. I'm calling him a he but I honestly don't know the gender. He has gravel that's to big to eat, and I feed him pellets and freeze dried crickets every other day. I also sometimes feed him squash, green pepper, carrot, and romaine lettuce. I also keep a beak stone in there, his previous owners said snapping turtles need one to sharpen their beaks on. I'm a little concerned because sometimes he nipples on pieces that broke off it. I throw a few algae pellets in the tank sometimes to distract him from nipping at the stone. Today I noticed mosquito larvae swimming around in the tank I was surprised to see them due to the water moving from the filter. And I assumed the turtle would eat them, but he doesn't seem to notice them. I also noticed very small worms that float around when the gravel is kicked. I read that the worms are there because of a build up of uneaten food and that a few water changes would kill them off. Are they harmful? Dose anyone know anything else I can do? I also read that fish would eat the larvae, I went and bought around 5 commit gold fish assuming they would eat the larvae and then the turtle would eventually eat them. But they don't seem interested in the larvae either, and I think the turtle is a little startled by them.