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dank_
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They sure do look happy for all the fits you're having over the pH shifting. Seriously.
from personal experience im alot happier going the sterile route i
Root rot can cause ph fluctuation.
I have the opposite problem. My ph is shooting up. Within 2 days of changing rez. it goes from 5.5 to 6.2 overnight. It does this for about 4 days and then stabilizes. I'm using ro too!
Effects of Low Alkalinity
Not everybody in North America has irrigation water with high alkalinity. The primary problem associated with low alkalinity water is a tendency for media pH to drop over time. Growers often run into low pH problems when low water alkalinity is combined with a fertilizer high in ammoniacal nitrogen. Fertilizers high in ammoniacal nitrogen are acidic, and without any alkalinity in the water to balance the reaction (resist lowering of pH), acidic fertilizers will tend to drive the media pH down over time.
Fertilizers that are high in nitrate nitrogen often do not cause the media pH to increase when combined with low-alkalinity water. In fact, it is often recommended that growers with low alkalinity water use fertilizers high in nitrate nitrogen simply to maintain a stable media pH. When low media pH does occur in conjunction with a low-alkalinity water source, raising media pH with high-nitrate fertilizers may be difficult or impossible. Growers with low alkalinity should stock potassium bicarbonate or liquid lime, which raise media pH.
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