I think your ph is too low, if going in 7.0 and coming out 6.3... that would mean that the ph of your soil is probably less than 6.0. More info here: http://boards.cannabis.com/plant-pro...hy-how-do.html

Also, when is the last time you changed pots? How old are the plants in total age? What size pots are they in now?
bigtopsfinn Reviewed by bigtopsfinn on . ph problems ? white rhino :( h33y guys .. can some one point me in the right way!! please:thumbsup: im growing white rhino in soil lights on temp is 28 lights off is 19 plenty of fresh air and circulation be 4 i adjust my cf the water is 7.00 i take it down to 6.3 when fert is added i tested the run off and its comeing out @ 6.3 when i flushed it with the plain water of 7.00 Rating: 5