It did get damn hot here... I still have some yellowing going on but the new growth is looking good.. I am on a muncipal water.. I am up in the far north sac valley.. at about 700 feet elev.. I do use the Hanna ph meter.. I have to calibrate every morning just to make sure the thing is working. " I really don't trust It" I thought the regular ph kit would be hard to read when you have all the dark water???