I have owned my water dragon Zeus for 2 months. Enclosure is 36x18x24. Coconut chips to keep humidity. UVB and basking light. Temp is 90 at basking spot, 84 at warm side, 81 at cool side, humidity always at 75-77. I feed Zeus mealworms, red wrigglers, fruit, and fish. Problem is everytime I go to school and come back, I see bark in the water, and in other places like plants. Then i find him digging. As soon as I handle him and let him roam(dragonproofed) he stops for the whole day. Then it starts again when I go to school. How do I prevent it? Also, he or she is only a foot long.