So I built a new rack, much like halfdawgs and such. I did make a few changes, I put in two rows of 6 qt shoebox tubs and one row of 15qt tubs. The rest are 32 qt tubs.

Here's where my question comes in. I was getting ready to order the flexwatt and a herpstat or helix thermostat (as I was currently using a ranco) Then I thought about it and I'm going to have to run rows of 3 inch flexwatt on the smaller tubs and 11 inch flexwatt on the larger tubs. How would I set it up so that the herpstat or helix could run both at the same time without the temps in the smaller tubs getting to high, or the larger tubs getting to low?

Thanks in advance for any suggestions.