My rez ph is 5.8
But when i chekecked bottom of trays was 6.8. What causes this?.
Is temperature in room?
Growin in coco- pebbles 60-40
Pre washed pebbels and says ph neutral on bag.
How many gallons is your reservoir? Are you using a submergible pump in your reservoir to keep the water moving? I had the same issue and ph would always go up until I got a submergible pump for my reservoir.