It was the strain....poor strain clones...all of them were the same Grand Daddy Purple....got 18 clones 2 months ago....only about 6 are any good. two are flowering right now and the other 4 are 36" high and still vegging....looked in up the grow bible....and found the problem.....I still want to add Silica to my vegging plants right after I move them from the cloning machine to the 1 gallon pots...and I believe it will help the stock....I use can mag for the roots and I use Pro-mix soil with worm castings.