One other question. Where should I place the diffusers come the cool weather? I want the best DO levels but I am very concerned if I leave them at the deepest level where they have been that it could casue the temps to be too cool, too deep?
By the way the fella that came up with the Eco 7 system is my hero. Throughout this year's crazy hot temps, 90's for days on end with weeks of rain short falls, our little pond was healthier and held more water than dozens around me with huge fountains evaporating gallons of water into the air.
