As a sidenote an RKL can be had for as little as $120. That includes:
1 x ReefKeeper Lite Head Unit
1 x PC4 (total of 4 outlets)
1 x Temperature probe (iTemp)
1 x SID - System Interface Device
1 x Programming Coupler
It appears you run your tank temps quite a bit cooler than the rest of us do. Is there any particular reason you choose to do this?
Please share with us, maybe I can understand better!!