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I am at a loss and would love it if someone could help me here...
I'm growing flood and drain with coco in smart pots.
I'm using the Lucas formula at about 1100uS with GH micro-bloom nutes.
Res temp stays about 70-72*F.
Flooding once per day.
I apply a worm casting tea to the reservoir and top feed the plants with it every week.
Using an Alita (AL-40) air pump and PVC diffuser to aerate the water.
The plants look super happy, the roots are exploding out the sides of the smart pots and I cannot detect any signs or harmful pathogens in the res (no slime and smells "earthy").
But for some reason the nutrient solution in the flood and drain reservoir drops like ~0.5pH every day. To be clear this pH drop is happening between floods..i.e. The roots are not in contact with the water when the pH is dropping like this. I don't know what the hell is causing this, or how to fix it.
Are beneficial (or not-so-beneficial?) organisms in the worm casting tea feeding on something in the reservoir and changing the pH?
Is the high volume of air I'm pumping through the nutrient solution forming carbonic or nitric acid with the water?
Something else???
I'm growing flood and drain with coco in smart pots.
I'm using the Lucas formula at about 1100uS with GH micro-bloom nutes.
Res temp stays about 70-72*F.
Flooding once per day.
I apply a worm casting tea to the reservoir and top feed the plants with it every week.
Using an Alita (AL-40) air pump and PVC diffuser to aerate the water.
The plants look super happy, the roots are exploding out the sides of the smart pots and I cannot detect any signs or harmful pathogens in the res (no slime and smells "earthy").
But for some reason the nutrient solution in the flood and drain reservoir drops like ~0.5pH every day. To be clear this pH drop is happening between floods..i.e. The roots are not in contact with the water when the pH is dropping like this. I don't know what the hell is causing this, or how to fix it.
Are beneficial (or not-so-beneficial?) organisms in the worm casting tea feeding on something in the reservoir and changing the pH?
Is the high volume of air I'm pumping through the nutrient solution forming carbonic or nitric acid with the water?
Something else???
from THCtalk.com - Cannabis Growing Forum & Cannabis & Marijuana Discussion Forums - Hydroponic Growing
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