Hey i use canna a-b nuets for hard water (im in london with hard water) with canna ph down. I have 1" rockwool cubes supporting my plants in 3litre pots filled with clay pebbles in the E&F table. I usally dont flood my table deep enough to get the rockwool cubes wet but i didnt know it was a problem if u did, but i can see what your saying. But still i add my nuets and they do bring the ph down but i still have to use a little ph down to get it right but then it just keeps rising. im only running like 650 ppm though including the down when i up my neuts will this help stabalise my ph?
zemcimill Reviewed by zemcimill on . Why is my PH always rising? Hi i was wondering why my ph keeps rising. I mix up a full tank to (20L) to 5.6 and by the end of the day its up to 6.1. I have been taking it down with some PH down but i understand its not good to add too much or you will poison your plants. Also i hae noticed my leafes are drooping a bit towards the end of the day. The plants are in clay pebbles in ebb n flow system. Neuts and all that are spot on. It looks like over watering but i only flood the table ebery 6 hours. However the plants are Rating: 5