Bubba Kush winter 20

1/24-1/30 1/24 I went back and switched week 7 to "veg" because there is no option for selecting a week to 10 days of "transition" from veg to flower and wanted the weeks in flower to be a little more accurate for calculating expected finish time. 1/27 plants have finally fully transitioned to flower, so about 8-9 weeks left based on prior experience with this strain. Moved to column 6 of the GHE flora chart. Pre watered with 22 oz purified water before feeding. Still having pH issues, its a perfect 6.2 after feeding but climbs back to 7.0 in between. Wondering if its the brand of perlite I added to the soil? It's consistent across all 3 containers, each with a different strain, so its not a plant usage issue. I used the same proportions of the same brand and type of soils for my blend, and the only difference was the brand of perlite. Since it climbs gradually over the span of 4 days, that makes me think the cause is being "slow released" into the soil, which also makes me think perlite.