Well i failed too mention that i am going with a mini split ac unit which has a seperate dehumidifier built in. It says that it removes 40 pints a day. I do plan on installing glass tops on tanks. I figured with spray insulation the room will be very easy too maintain temp thus probably not needing in tank heaters. If humidity is still too much i will have to do some kind of ventalation other than opening door.
Mini splits are very nice systems. You'll really like it, very energy efficient too. I work for an AC company an the only problems we've had with the minis we install are frogs an lizards getting into the outdoor unit an frying the control board. It is still rather rare though