CannabisJohn
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Amberlite CG-50 I have never tried it but you might looking into it. This product is supposedly going to keep your pH in check and is reuseable. Just been to busy to play with it. JK
bfunny that you mention urine.. for a test I collected and tested my ph a few days in a row.. ph fluctuated by 2 full points from 6 to 8.. so its not useful for ph down at all.. there is lots of nitrogen in urine.....
here is another PDF...http://www.ecosanres.org/pdf_files/ESR-factsheet-06.pdf
I am sorry but there is no way putting whole oyster shells is going to do much of anything to the soil unless you factor in their breaking down over the course of hundreds of years...Cannabis John, Try whole Oyster shells. It is made out of Calcium carbonate, Magnesium, and Silica.
Keeps Ph at 5.8 - 6.0. Depends on how much nutes are in water. High nutes = about a 5.85 to 5.9. Middle range when nutes start to deplete 5.9 - 5.94. When nutes run out it rises to a 5.94- 6.04.
Hahahahha..
Never worry about ph control again. Perfect!! Most organic way of maintaining ph! Just a few oyster shells in system. Each shell Last about a 1-2 years. I buy them at Winco for 63 cents and cook them, then clean them. Easy!
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