How I mix concentrated Jack's 321, hydroponic fertilizer. 1:100 strength. Updated 2022.

Just a short and simple video of how to make concentrated Jack's 321.
My recipe 2022:
Part A-
Mix
378.54 grams of Jack's Part A, and
98.94 grams of Epsom salts in a 1 gallon jug.
Fill 7/8 full of warm water, so there's room to shake. Once it's dissolved (in about 10 to 20 minutes), completely fill the jug with water. This is concentrated Part A .
Part B-
Add 252.36 grams of Jack's Part B in a separate 1 gallon jug, and fill with warm water as above.
It dissolves much faster. This is concentrated Part B.
I add 38ml of each, per gallon of water for plant food.
You can adjust PPMs by adding more or less of equal parts A and B to suit your desired PPM level. Always add A first.
I water drain to waste style hydroponics which requires me to feed straight water every 2 or 3 waterings.
Always check your PH, and only adjust after mixing. I try for a PH of 6.3 to 6.5.