I really really need help

OK I'm sorry but I can't post pictures because my computer is down and I'm relying on my phone and I can't figure out how to upload them from here I really can't let these plants die I have two plants under a 250 hps light and they are in mg soil for about two months now and they were looking really good for a while now my one plant isb drooping and has on some of its leaves Brown spots with some yellowIng and the other one has a few dead leaves at the bottom and just about all of the leaves are a light green instead of the dark green they once were the plant that is light green now is in a 1 gallon pot this know is not good and the other is in a two gallon pot and both are about 13 or 14 in tall what could be causing this I have a ph meter that you stick into the soil and it reads a little under seven. I also have shultz plant food but I heard its not good to feed them nutes when theyb are in mg soil. I know its hard without pictures but I described it the best I could. they seem to be still growing so I'm not sure. thank you any questions you might have to ask me please do and please please check back in. thank you. also the ph is about 6.0 according to the yellowish colour it changed tov well thank you.
 
Top