I have been successfully growing for a few years in square 5 gall dwc buckets. I grow at 70 degrees with success and have no issues with root rot or anything as long as I don't exceed the resulting 68-70 degree water temperature. I am thinking of adding an external mag pump similar to the Current Culture setup to circulate the water. Before I do it - does anyone know if circulating the water in my system is likely to raise or lower the water temperature. Hopefully someone has already been in my situation and tried the same thing.