The new coco coir mix was the answer. Plants responded over night with new growth following soon after.
Changed out hydro tank water and upped nutrients to medium feed week three schedule. Also added additionaphosphates/pot ash to try and help green up the stems. Light still at 50%.
Probably veg a little longer to ensure the plants are good and healthy.
@Tylerjc713,
I use a large Tupperware type res. I don’t know max capacity. I just filled with 25 gallons and marked a line. I don’t top off nutes in between drains. I drain my res every 7 days and add new nutrients. I grow in coco coir so I don’t have to clean stones. I clean my pump when I drain every 7 days.