If your having issues with your nutrients dropping out of solution and clouding out the reservoir, sometimes you have to mix one solution before the other or ph before mixing and adjust later or ph after mixing, sometime the temp of the water your mixing with might cause this to happen if it's to cold or to warm, usually I would go to YouTube and specifically search for proper mixing techniques with the nutrients you're using, sometime it's just as simple as how fast or slow your mixing your reservoir when you do it...Are you checking the the PH in the trays or just the reservoir? Do you have a air stone in the reservoir...My buddy shared a pile of tips with me before I run my first run in autopots and the first thing he told me is always use the blue air stones because the other ones will change your ph....Are you using vermiculite or perlite or clay stones at the bottom of your pots for a buffer zone? There's a few variables to go through if you want you can pm me and ill gladly help out...Ive been running autopots for a bit and love them and my buddy is a distributor and he loves his to...