I've got a bit of a dilemma...! I now have 12 plants in bloom, 3 sets of 4, spaced out by 1 week. My problem is rising Ph. My water that comes into the grow area goes thru a cylindrical water filter, one you use for water going to a refrigerator. From there it goes to a 50 gallon reservior that is aerated and constantly moving. The water comes in at 7.8-8.0 Ph and 80-180ppm. I'm using GH FloraNova products that after mixing brings that water to 5.8-6.0 Ph and 1200-1400ppm. I run the pump for 15 mins, 1hr before and at lights on. After that the pump runs for 15 mins. every hour til lights out, then one time in the middle of the night. After 1 full day the Ph rises from 5.8 to 7.2. It takes me about 1/2 teaspoon, per 6 gallons of nutrient solution, to lower it back to 5.5-6.0.

The reason this is worrying me is that there seems to be a nutrient lockout. The plants that are almost at 1 month flowering have been losing their fan leaves from the bottom and moving upwards. It seems to me that I have a Nitrogen deficiency because of the yellowing older leaves along with slightly red stems. Please let me know what you think. Other then the yellowing fan leaves the plants are budding and filling out nicely.
bleupitbudz Reviewed by bleupitbudz on . Need help with rising Ph....! I've got a bit of a dilemma...! I now have 12 plants in bloom, 3 sets of 4, spaced out by 1 week. My problem is rising Ph. My water that comes into the grow area goes thru a cylindrical water filter, one you use for water going to a refrigerator. From there it goes to a 50 gallon reservior that is aerated and constantly moving. The water comes in at 7.8-8.0 Ph and 80-180ppm. I'm using GH FloraNova products that after mixing brings that water to 5.8-6.0 Ph and 1200-1400ppm. I run the pump for 15 Rating: 5