Thank you for reminding me about the distinction between ventilation and circulation. It seems circulation is good and ventilation is not as necessary. I have been looking at various computer fans with adjustable speeds. Between adjustable speeds and maybe incorporating a timer, I think that should provide good circulation.

The second question is a bit complex. I like the idea of having some water under a false bottom to help regulate temperature and humidity. I am worried about a couple of issues including "standing water", managing water levels under the false bottom and weather I need to "change" this water periodically. I have seen people that have a pond that they can use to siphon water from the bottom of the tank. Is this a good or bad idea. Just looking for some thoughts regarding water in the bottom of the tank.

Thank you very much for you insights.

John