My mix is 50 coco "Bio juice" 25 pert, 25 light warrior. I'm using Ro water, I started at 5.8 and have worked my way up to 6.2, I just started using a tea from my local shop. The other day I was talking to a experienced grower, he said just mix nutes up and feed no ph nothing. I have been adding 250ppm of cal mag, then nutes, then tea, and trying to adjust the ph but the meter jumps all over the place, and yes its calibrated weekly. I would like the idea of just mixing nutes and feeding no ph, I did get a stable reading at 5.8, with everything minus the tea. I have noticed when adding the tea thats what I think causes the fluctation. Since Ro water has no Ph the ph is what is added. Thanks any help would be greatly appreciated.