solution change

[daveb]

I made some major changes some time ago i stepped away from the 2 part blends , I know use a three concentrate ( A ) Master Blend 4-18-38 2.4 grams , ( B ) Calcium Nitrate 15 - 0 - 0 2.4 grams , ( C ) Epsom Salt 1.2 grams per gallon. masterblend and some suppliers for the last decade plus had two part concentrate the a 1:1 mix A + B plus water to make a gallon A masterblend + epsom salt / B calcium nitrate two part but got thinking a while back about the concentration amount, so now i do A B C each one in a 1 liter bottle mix concentrate 30 oz of water and 72 grams ( 2.54 oz ) of A or B in seperate bottles , 36 Grams ( 1.27 oz ) of C in its own bottle . Do not mix calcium nitrate with your other parts prior to use it will not dissolve properly, if you do use A B two part fertlizer and epsom salt for A and calcium nitrate for B because you are doing two in one dissolve concentrate on small batches you would see any measureable difference its just a tiny amount of volume discripency but when you get to level of mixing hundreds of gallons in a batch you will notice a variation of EC compared to doing all three as a seperate concentrate. The real numbers of dissolve as PPM will represent it easier for most to understand in mixing 1 gallon or quart of concentrate A B C lets just call it 2.4 ppm versus grams so 24 + 24 + 12 = 60 ppm in 3 oz of concentrate add 125 oz of water 1.40625 ppm final stock concentration , now in an A B solution 60 ppm in 2 oz add 126 oz of water 0.93750 ppm concentrate final stock concentration.
So this throws off the concentrations of the components in ppm and ( ec ) so if you add two oz of part A of the two part you bring the nitrogen level proper and total PPM back up you the total epsom salt also blended with it you are now are increasing the magnesiun level which can inhibit the calcium uptake form the solution