why are leaves twisting and turning yellow

plants are about 4 weeks old from clones. They have been on 12/12 for about a week. Three days ago I changed my rez to bloom formulation. Now some leaf tips are twisting mainly newer growth, as well as starting to yellow on new growth and less on older leaves, during veg they were very nice deep green. The pics arent that good but i included them anyway. Can anyone enlighten me on what may be going on?
 

Bulldogbray

Member
I am having the same problem, my friend said a vitamin B1 defec...but hell I don't know. I would love to see the response. Please no assholes say use the search function...sorry to burst the bubble, but it is garbage...

Bulldog
 
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