Be careful with the Cobalts, I've had friends that had their Cobalts split open and spill the contents into their tank. I had a Finnex Titanium 500w and I had it plugged into my Apex controller. No need for a heater controller
I would have went with a finnex considering so many people like them but alas, my lfs doesn't carry them. That's why I ended up going with the marineland 400w
