Doc111 I have been growing for over 20 years and this has to be the best info i have ever read!...Most growers look at every thing but water...I live where the water sucks and i have invested in R/O filters,softners,iron filters and pre/filters,i spend well over $1000 a year on filters..When i first moved here 12 years ago i grew inside with rockwell,my first crop just got fried because of my water and i had to start using rain water(we get lots of that)But now i grow in a large green house and i cant save enought water for all summer so i invested in filters...My water comes out of the well at 680ppm,and over 8ph...i have never had it tested but you can bet its salt....Even in the green house i always have trouble with iron lock up because of the ph...I start every year with two kinds of lime,cotton seed,fish meal,and a little chicken compost to get the soil ready...then i water with teas i make,ending with bat and seabird G for flowering...Who would have ever thought bad water in the coast range of the northwest Oregon?..But even rain water is getting high ph...I seen the other day on TV are oceans are just one big soup of trash..What have we done?