Thanks for the comments on the enclosure. The aquarium is on top of the tortoise hide to keep water from grounding out my infared 250watt
heat system that kicks on and off using a ESU 500watt thermostat. I cut a round hole in the top of their Tortoise house so it can shine down through it. A backup 100 watt Reptile heater also kicks on and off thermostatically in case of bulb failure. later Richard