I have 1 vent from the furnace that blows into the garage,and also have other ponds and a dehumidifier that blows hot air all day long.So it actually gets too hot even in then winter.
Awesome set up! You can get an Olympus digital camera fairly inexpensive that take high resolution pics and video underwater up to 30' deep. Use it on vacations to Carribean.
Are those tarps inside the ponds as a liner or what do ou use for waterproofing?