Checked the strain, 9 weeks flowering time. Sativa dom, so it's gonna stretch 2-3x size when you switch to flower, "Haze mother" was listed,... so it's not gonna be a great yielder, but potent by what I've read. (no personal experience with a Haze phenotype)

Waters neutral? My tap is 8.3! Not sure where if it's possible to BUY properly PH'd water.

I adjust down using General Hydroponics PH DOWN (Phosphoric Acid) if needed I'd use PH UP to move the other way, but haven't had the need.

The drop tests are fine and as long as your 5.0 to about 6.5 they seem fairly accurate. However many nutrient lines add dies to different nutes that will skew results of color based testing.

Personally I use a Hanna,... it's not the best and requires frequent calibration. (tho if you read the fine print, they all do) So if you go for a electronic pen make sure you get calibrating buffers to go with it



Not sure if there's any tricks you can use with the MG soil, I opted out of MG after my first bag of it for my indoor vege garden had all kinds of bugs and I played hell balancing my nutrients.

Look for Rusty Trichome to better answer questions there.