TastyBuds

Hello, I am growing from seed one Feminized Photoperiod (Mac-1) and Feminized Photo. (Watermelon Skittlez) and one Feminized Auto (Biscotti) and Auto Fem.(Frozay) strains for the first time in awhile and trying something new for me a hydroponic medium of Rockwool Cubes. Started seeds in the 1 in. Cubes then Transplanted into bigger 4 in. Cubes of Rockwool. I have a S.F. Setup and 480 watt Led Spider F. 23 in. away from plants and a humidifier in the tent keeping a 55% humidity level with also spraying the leaves with a mist of R.O. Water a couple times a day in a 4’x4’ tent. They started off great only soaked small Rockwool cubes in Reverse Osmosis Water and thrived then Soaked 4 in. Cubes in a Premium Mycorrhizae powder mixed in the R.O. Water. Transplanted cubes seedling and we’re doing great and started giving Grow nutrients soluble in the R.O. Water and they did great feeding a few droppers full of water injected into the Rockwool cubes once a day or every other day for a couple weeks. I also included a few droppers full of water solution mixed R.O. Water with the Mycorrhizae powder also. I had these 4 in. Rockwool cubes sitting in a bed on Cleaned Hydroton clay pebble growing medium.I have three issues though now. (1) * I noticed after a week there was great new growth and looked nice then. Now last few days I started to notice that one of Plants are still growing the new growth but the leaves and growth underneath looks like it turns brittle and dry brownish and have pinched it off but now it seems to still do this cycle of new growth but the other leaves underneath turn brittle and dry. (2) * Upon inspection of the other 2 plants the white roots were exploding out the bottom and looked great from the Mycorrhizae and squirted the bottom with a bit of Nutrient water mix and next day the roots now were dried up and rookie mistake so I quickly got 2 more soaked 4 in. Rockwool cubes soaked in R.O water with Mycorrhizae and stacked them together so the roots could grow into that and hopefully rebound better with moisture, but the growth seems stunted at this point, any suggestions Please ! (3) * I also have a late seedling (Gelato 41 Fem. Photo) in a 1 in. Starter Rockwool cube and was shooting up good from seed decided to put it with others in front of the oscillating fan to strengthen the stem growth but after a couple days I went to check on it and noticed it was bent over stem still intact but kinked some and propped it up with toothpicks to see if the seedling stem would strengthen but growth seems stunted after a couple days still any suggestions on this please would help! I numbered them if you want to number your answers to correspond would be helpful to me and perhaps others with the same issues ! Thank You very much but This may be a rookie question but I’ve tried a few things and still no change, Please help with any suggestions you can to get these off to a better growth! Thanks