one correction .... runoff ph is 6.2 !

im asking again .... can please someone experienced grower or someone who had similar problem help me ?

everything seams fine, but there is a problem and i cannot see witch .

thanks . peace .
DrM200 Reviewed by DrM200 on . First time serious problem . Hello . First thing i want to say is that im not a first time grower , actually this is my 5. grow . I never had this kind of problem . Usualy i dont have any kind of problems but this time ...i cannot beliave it . its so early for this kind of problems :( please help . Im using always same medium like 4 times before, i never had problem with this medium . PH is of medium is 5.5-6.5 . Im watering with filtered water , ph 7.0 runoff ph is 6.7 Rating: 5