Steep Learning Curve

[gardenmark]

Thanks for that, I did try to read as much as I could. The guys at the Hydo store helped a bit. I was a design engineer for computer fab equipment until I reached the age of fifty. Now I'm a retired boat builder w/o an income, so building a greenhouse on a shoestring has been a big challenge. Having the four tanks I bought the 2.5 gal of PBP grow and bloom (not using bloom yet). I adjust PH but not sure I really need other additives????
I did a search and looked at the Hydo systems that UPS has, your systems are impressive as well. I know how to use computer control but I wanted to keep things as simple as possible and still get the results of ebb and flow. Unlike me (who was given the pots and trays) you have made you systems from every day materials, if I ever expand I will look at your design very closely.