Ohhhh okay I get it now! So your Herpstat 2 is already controlling two heating elements on your tank. I think the best way to split the thermostat between two tanks would be to order some heat tape to the length that you would need instead of using two separate uth's. Then that will free up a spot for the next tank.this is what I did with my 40 tank. Is there any reason your using two uth's?
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