hi guys, this is my first post here. I am trying to figure out what exactly is going on with our tank. we have a huge, approximately 300 gallon tank with a waterfall, two heat rocks, plenty of vines and branches as well as a fogger. We have a uv light recommended from the reptile store we bought the tank from and a basking light as well as two heat rocks. we have two water dragons, one chinese, one australian, and one chinese tree dragon at this point. All of the lizards we've had have died over the last year, except for the chinese water dragon. The deaths are mostly tree dragons from what some have told us is coccidia. it is usually a distended belly but sunken in everywhere else. I fish out feces from the water every day and remove dead bugs and feces throughout the tank but cant for the life of me figure out how this one lizard is healthy as can be but the others are getting sick and dying.