So , one of the biggest challenges of keeping 500 gallons of water in a 12x14 room is keeping the humidity down .a 10 BTU AC , a chiller and a super loud but very high velocity fan set up to suck air out of the room to reduce the humidity . It was at 75% . At that high humidity the floor was getting damp . I have managed to drop the humidity to 60% so far but its taking a lot to do going to try a few other things to see what works best and then fine tune it . any Ideas on the cheap are welcomed setting up central air is not an option at this time .