I have a question about racks and flexwatt

[twh]

closed in back
80 degree room temp.

starting with that room temp i would go with 3" 6 watt flexwatt,the 10 watt (3") is overkill and can reach temps of around 150 degrees unregulated.

have you considered putting the tubs sideways so you could put two 12-15qt. tubs in a opening? more flexability if needed.have fun!