Thanks gents :smokebuds:
As you can see, I have a bit of a Mg deficiency due to my pH dropping low over this past week. Been slowly bringing pH back up and have noticed a little bit of a rebound. One thing I didn't do this grow that I've done in past is add dolomite lime and epsom salt to my soil mix when I switched over to ProMix BX. I wanted to see how the soil behaved on its own and make up for any deficiencies using the nutes. I will definitely add the dolomite lime to buffer pH for the next grow, regardless of the strain. The next generation of PGH x ALF#3 will also get some epsom in the mix - I didn't have any problems with Mg deficiency the first time I ran the PGH and that mix had epsom and dolomite. Not sure if I'll add epsom to the mix for autos though... seems like it would be best to keep the soil as pure as possible until they start needing nutes?