So I have been monitoring my PH & PPM's for the past week or so again. I was using strips but they were not working much and I was WAAAy off. I just bought two new pens and finally I got two that stay calibrated and work like a charm. I am about 2 weeks away from harvest and the plants are showing mad signs of PH problems, bad leaf dead spots, curling, yellowing, etc. No visible deficiencies, mostly just unhappy pissed plants. I flushed them with bokashi tea for a few days when I got the pens to hopefully get rid of all the salts. I have been alternating feeding like this: Basics: Tap water PH: 7-7.5 Tap PPM: 85-90PPM Tea = 180 PPM 7 PH Mild Solution, No fertilizer: 1 - 85GAL resorvior contains: Half Tea, Half Water 2700ML Big Bloom 125ML Bud XL 225ML Cal Mag Resulting PH: 7.4 Resulting PPM: 400 Added 20ML PH Down Resulting PH: 6.3 Added 5ML PH UP Resulting PH: 6.5 Ending PPM: 422 Results: PH 6.2 (usually up to 6.3-6.5) 650PPM Within healthy range, no up/down needed. Fertilizer Solution: Half Tea, Half Water, 85 Gallons 675ML(max, sometimes 450ML) Tiger Bloom (Fox Farm) 125ML Bud XL (House & Garden) 100ML Natural Bloom (Organic Blah blah) Resulting PH: 4.6 PPM: 650 Added 25ML PH Up Resulting PH: 4.8 PPM: 670 Added 300ML PH up Resulting PH: 6.5 PPM: 785 I fertilize every other watering as according to Fox Farm schedule, I believe it may be too much though because our soil contains coco. We are using Mendo Mix. I tested the run-off after watering with fertilizer today, and to my suprise it's 7.3PH, 430PPM. What should I do to correct the PH? If I should change anything? Thank you for all your help, I love this community!
I think you should do a soil PH test ASAP like20 minutes ago do it today hurry. Have you calibrated your PH tester lately? You could have done something to the 7.0ph buffer if you even have buffer. That is seriously a high PH for what you are explaining. Check your instruments, get 7.0 buffer if you don't have it, calibrate. test again. Get a soil PH test kit ASAP. are you sticking the PH tester in the dish under the plant potter or are you using a syringe to draw out the water to put into a cup to test then? interesting.....