PH & PPM Getting it right per gram of Hydro Mix

Cliff's notes for Hydro MixCucumber formula.
Cucumber Mix 8-16-36 per 100 gallons of water.
Grams 226.796185 per Eight Ounces.
Seedlings:
8-16-36 mix Eight ounces per 100 gallons
Calcium Nitrate (CaNO3) Six Ounces per 100 gallons water.

Magnesium Sulfate (MgSO4) Four ounces. per 100 gallons water.

I made my formula to 10 gallons and Five Gallons for my Rubbermaid Tough Box.
Source water is County is 7.2 PH Roughly depending on temp and standing.
PH seems to go down with heat and time of Clorine to evaporate.
Monitoring is required for PH and PPM.
All media is soaked before placement of plants at Two weeks of growth.
Soaked media solution was used on other plants to start fresh.
I didn't want rockwool particles to be mixed in other media.
PPM 1350  Seedlings

PH 6.5 - 6.7 Seedlings and mature plants.

                         Checked with Rockwool slab PH took it up to 6.5 PH.

                                                 Adjusted to 6.5 PH

                                 Bluelab Trucheon meter PPM to 1350 for seedlings.