I had a very high ph 27/12/2015 i use lemon juice and advanced nutrients Bud candy 29/12/2015 i bought ph test kit and ph down i test my ph and it was 9.0+ mabe 11.0 ph i use ph down and advanced nutrients Cal-Mag Xtra 3/1/2015 this problem started and i think it's p-k i use general hydroponics flora bloom and and advanced nutrients bud candy let's see if it stops.