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BlackThumb · 06-08-2008, 04:18 PM

I have seen the Rapidtest Soil test kits which have the four cylinders to measure all of the Ph, N, P and K.
I can dip my Hanna in to obtain total EC/ppm and Ph OK, but that won't tell you what your EC is composed of by quantity/% of N, P, K and don't really see meters sold for this as a common commodity on grow sites/stores.
Short of full lab analysis, can you measure your hydro nute solution N,P,K amounts other than just combined EC, and how? Do these soil test kits work equally well just using the nute solution from your hydro, or do they also count on the added debris in soils to be accurate?
Right now, I only mentally add the stated ingredients as labeled ie..pour in a 2,0,2 with a 3,2,4 and assume I have a 5,2,6. (All made up #'s for illustration).

06-08-2008, 04:18 PM	#1
BlackThumb 420 Member Join Date: May 2008 Location: Lewisville Texas Posts: 129	Can measure EC, but not components of I have seen the Rapidtest Soil test kits which have the four cylinders to measure all of the Ph, N, P and K. I can dip my Hanna in to obtain total EC/ppm and Ph OK, but that won't tell you what your EC is composed of by quantity/% of N, P, K and don't really see meters sold for this as a common commodity on grow sites/stores. Short of full lab analysis, can you measure your hydro nute solution N,P,K amounts other than just combined EC, and how? Do these soil test kits work equally well just using the nute solution from your hydro, or do they also count on the added debris in soils to be accurate? Right now, I only mentally add the stated ingredients as labeled ie..pour in a 2,0,2 with a 3,2,4 and assume I have a 5,2,6. (All made up #'s for illustration). __________________ If plants grew on grins and stares, mine would be Redwoods!