So if I run a pair of titanium heaters with their own controller through a reefkeeper, then I should set the heaters controller a degree or two higher than what I have the RK set at, right? 75 gallon tank with 30 gallon sump, fairly high turnover, so I was thinking one 200 watt heater and one 150 watt heater (350 total watts). Sound about right?? or would it be better to run one 300 watt primary and have the 200 watt as the back up set a degree or two lower?