How warm is too warm? I noticed that my "EZ-cloner" tank had water at 90*f. My partner had the lights on full blast, right down on the cuttings. I backed it up to about 2' above the cloner tank and the temp went down to 85*f. My partner couldn't understand why the cuttings were yellowing/browning on the leaf edges. I told him that he was burning them up. What should hydro water temp be ideally? clone tank tank temp?