Your EC is not too high at 0.7, it is rather low. And the nute you're using does not contain Ca. This does appear to be a good choice for growing cannabis, esp. during flower. I can't stress enough that you should save this for your lawn or other garden and get a nute balanced for your crop. Grab a quart of flora nova bloom for $25 USD. Do a foliar, flush and resume at about 1.2-1.5 EC. Bank on it.
Total Nitrogen (N).…………………………………………………………..30%
2.06% Ammoniacal Nitrogen
3.31% Nitrate Nitrogen
24.63% Urea Nitrogen
Available Phosphate (P2
O5)……………………………..…………………..10%
Soluble Potash (K2
O)………………………………………………..……... 10%
Magnesium (Mg) (Total)…………………………………………………. 0.05%
0.05% Water Soluble Magnesium (Mg)
Boron (B)……………………………………………………………......0.0068%
Copper (Cu)…………………………………………………………..…0.0036%
0.0036% Chelated Copper (Cu)
Iron (Fe)…………………………………………………………….…...…0.05%
0.05% Chelated Iron (Fe)
Manganese (Mn)…………………………………………..…………...…0.024%
0.024% Chelated Manganese (Mn)
Molybdenum (Mo)…………………………………………………..… 0.0009%
Zinc (Zn)…………………………………………………………...…... 0.0022%
0.0022% Chelated (Zn)
Derived from: Ammonium Phosphate, Potassium Nitrate, Urea, Magnesium Sulfate,
Boric Acid, Copper EDTA, Iron EDTA, Manganese EDTA,
Sodium Molybdate, Zinc EDTA.