No disrespect taken my friend. I had figured I may have some ph swings I would have to look/watch for. What boggles my mind is the second time yellowing (iron def/lockout) is only one side of the plant was affected. The second plant is one week behind (as far as seed into the hydroton) is and has been healthy and happy thus far, where as the other one had it's first hard time 13 or so days earlier (in age compared). The only difference was skipping one week of prescribed nutes which included a grow powder. I will get a few meters for my next grow but this one was a budget grow, and more of a test for the light. Still hoping to have some ok smoke. If things get worse for number 2 then I will find a way to get a ph tester and up/down. Thank you for your advise and input, and happy growing