leaf rust

Hello everyone, i am currently growing 50x 2gallon in a 4x8 grow tent, Melon gum strain. x4 Mars hydro TSL 2000 I use tap water which is at 480PPM ( i know its very hard water but with 50plants i dont have much other choice right now than to use tap water) i let it air out for 48hrs+. They are...

Hey Guys, First time grower. Have gone threw the over watering process, let the plants dry out completely flushed them w R/O. Then gave them some light nutrients. All organic Vegamatrix nutrients - organic soil with perlite/vermiculite at bottom of pots. I believe I made the mistake of not...