binaryfission
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SO whats the solution for tap with high alkalinity? If bringing the pH down won't do anything, how would you keep the coco's pH from rising over time?
SO whats the solution for tap with high alkalinity? If bringing the pH down won't do anything, how would you keep the coco's pH from rising over time?
SO whats the solution for tap with high alkalinity? If bringing the pH down won't do anything, how would you keep the coco's pH from rising over time?
Wait, wait, wait.
I'm just reading the exerpt from the dosing handbook. It seems to be saying that from a practical point of view, lowering the PH of an alkaline solution is handled by adding acid.
Lowering the alkalinity however, is accomplished by adding acid.
Additionally, solutions with high alkalinity generally have high PH, ie are alkaline. Is that about right?
The R.O. process removes alkalinity.
Match your water quality with the correct nutes.
Use nitrogen content to control pH vis a vis alkalinity in container grows.
edit: I don't know if it was mentioned on this thread already, but the only liquid hydro nutrient that I've found on the market so far that contains a relatively high % of ammoniacal N is Dyna-Gro Grow and Bloom with IIRC 20% ammoniacal N. GH 3 part and FNB / FNG are around 6% ammoniacal N.
FYI
Addressing pH Problems
Fine-tuning your substrate pH is all about the nitrogen. If you control it, you’re in control.
By Matt Taylor and Dieter Lohr
January 2010
Bill Argo is also all over this topic. I posted his links on the previous page.
You can try to use that tap water with a fertilizer that has a relatively high percentage of ammoniacal nitrogen.
The only brand of liquid fertilizer that I know of like this is Dyna-Gro.
http://www.dyna-gro.com/
part 3 of Argo's 5 part series: http://www.staugorchidsociety.org/PDF/IPAFertilizers.pdf
The “best” fertilizer to use on your plants is the one that not only supplies nutrients, but also complements the alkalinity and nutrient content of your irrigation water. In this article, we will help you understand how selecting a fertilizer will affect the pH and nutrient levels in the substrate. You will learn why water-soluble fertilizers are classified as acidic, neutral, or basic based on their fertilizer reaction in the substrate. Finally, with the information given in this article, you should be able to decide for yourself which fertilizers will work best for your growing conditions.