Quote Originally Posted by volak
There was some confusion with the form. I thought the 'source ph' meant the ph of the water when it comes out the tap...which is about 7. I always ph down to about 6, but with phosphoric not nitric.
ok well phosphoric acid is the right thing to use in flower anyways :thumbsup:

If your PH is 6 you shouldn't really be getting lockout.. is there any possibility you are overnuting them? this can also cause the same symptoms, mainly lockout.. too much phosphorous maybe?? This could be the case if you are using a high phosphorous content fert and lots of ph down? Let us know :thumbsup:

Oh, also, what is your PH runoff?

Peace,
Denial