The PH is so import and missed, or overlooked by many, always great to see it mentioned. They look gread buddy, as everything does that comes from you, thanks for sharing..DDThe medium I use really doesn't affect anything. I use a feed ph range of 6.3-6.5. in all the mediums I use. I never let it go out of that range. Our plants take in nutrients based on PH. Some plants do get too much N but It's easy to fix feeding RO a few times. The APPSS x APISS x WLF8 above took in too much so she has been on RO only this week,
All soilless mediums are buffered. Promix HP is 5.5-5.8... Once the PH drops to low the plants will suffer. Feeding 6.3-6.5 the medium PH never drops too low. Low PH is the #1 cause of all plant issues. I tried using 5.8-6 ph but found my plants did not take well to that low of a PH. Over the years of tweaking, I found a PH 6.3 is the lowest I will ever use in any soilless medium.