PJ Diaz
Well-Known Member
I didn't check any math but those ppms seem high to me.if i did the math correctly, total ppm of Su in 321 is 169ppm. 67 from the 5/12/26 (3 g) and 103 from the epsom (1g)
so for the RO formula, i need to add about 1.7g per gallon epsom to be close.