My gator keeps throwing up his chicken gizzards and hearts whenever I try to feed him them. He's had one pack before without any problems but every time since then he's thrown it up or not taken it. All he eats as of now is f/t mice and I want to add some variety to his diet, he's about 3 feet, what can I feed him? And what kind of fish could I put in his tank if any? He's in a 300 gallon stock tank. Also, what should I do for heating? He only has one heat bulb right now because it's winter and it's a water proof turtle basking bulb(50 or 75w), he usually has a 150 watt normal bulb in there too over his basking area. My room stays about 75 - 80 degrees and he's pretty active year long and eats every other day. Should I add a water heater or filter? I clean his tank once or twice a week which means scooping a bunch of water out with a bucket and then adding fresh water.