So the browning seemed to have slowed down but i was wrong.
My HPS camp in a couple days ago so a put the three big ones under and one of the younglings. (picture below)
I water all my plants 1-2 times a day with about half of my spray container.
18-18-21 solution every 3 days.
I use a PH/Moister/Light meter that cost only 10$ (picture below) I would say reading come out plus of minus 1.0 off.
My lower leaves were dying and if I picked them off then the next set of leaves would die to the point as shown in the two bottom picutres over a 3 days span.
For one of my plants, last night the leaves that had a bit of dark color in the middle of the leave for a while all curled up real bad. (last picture)
Please I need help to save them. I've got some ph up ph down on the way but with this ph meter I could just make things worse.
Here is your problems in order. 1-Overwatered, water every 2-3 days, not every 6-8 hours, airate the soil 2-4 in down with a stick or pen, they will perk up in a day or two. 2-containers too small, they will get root bound if they arent allready. 3-too much Nutes, use 15-30-15 maybe once a week, even during flowering use the same, the soil should have enough Nutes itself that you dont need any for a few months. 4-PH, most if not all public water is too high PH, a half a teaspoon of vinagar per gallon will lower it to aprox 6.2-6.8, you dont have to use PH down from a pool company, vinagar from your cabhet is the way to lower it. 5-You can get a PH tester at Lowes, Home depot, walmart, in the pool supply section. You test the water the same way you test a swimming pool or Spa. Your meter does not work. If you do it this way you can not go wrong, these plant are weeds and are very easy to grow. Dont over analize every detail. Give,em some good dirt, good light and a little good water, thats all you need.