to all this might be a little helpful for newbies like myself. My hydro is running a fogger 24/7 and my humidity is nailed at 40%. We are heating with natural gas which by its nature makes the air very dry. So I thought no big deal I will just run the fogger all the time to offset and keep the humidity up in my 4x4 grow tent. I noticed my 14 gallon res. which has 7 gallons of nute mix was going thru a gallon a day. So I would make another gallon of nute mix about every day or so to keep the res topped off. Then all of a sudden my ec/ppm went way over 2000ppm and my meter did the (1) which means to high to read. I thought im going straight by the gh 3 part guide. Then after some forum study here I found my plants are either using up the water only, or my fogger is causing excessive evaporazition which is causing a surge in nutrients. I noticed my drip emitters has salt build up. So to the pros out there do you think my thoughts are correct with the plants using the water only. I have started using water only to see if this can bring the ppm back down.