I am growing 2 White Siberian by Dinafem and 1 Bruce Banger by Seedsman in a RDWC system (3 sites + res - 5gal each). Im in week 5 of bloom and i am struggling to keep my pH stable. I am feeding Advanced Nutrients Sensi Bloom (A and B), B-52, Big Bud, Bud Candy, Rhino Skin + CalMag Plus and 2ml/gal Hydroguard. My current TDS is about 1200. Temperature at lights on never go above 79F and Humidity sits between 45 and 50%, my dissolved oxygen levels are about 2.6ppm mg/L.
I am having a very hard time controlling the pH. Roots are fine, i have a water chiller and the temp sits at 67F, no slime no smell. pH would rapidly increase in few hours from 5.5 to 6.5.
I do know that this can be indication of the plant being hungry, but i always fed at around 900ppm500 and just recently bumped it up since i start seeing Calcium issues.
Is there something i am missing here? Veg went smoothly as the first 4 weeks of bloom, nothing really changed, i assume its the plant trying to tell me something, just can’t figure out what, i would appreciate some new input, because at this point, after a week fighting this pH issue, i got nothing left.
Please let me know if more info is needed, this is my medical garden hence very important to me!