01/25 - I've upped the epsom from 1.0 to 1.2 g/gal and PH from 5.8 to 6.0 since Saturday or so. Hopefully, one or the other takes care of the nute problem. I clipped all the damaged leaves so I'll be able to tell if the problem is ongoing or in the past. I ended up with maybe 7-8 colas with damage, but only 3-4 with anything I'd call significant. Near as I can tell it was limited to the fan and sugar leaves of the bud sites. I've seen nothing lower down, which does not bode well for my magnesium theory. PH problems are my primary suspect right now, with the Lumina in the spotlight. I don't know how long it will be before I try it again, but my guess is it will be a long while. At $50 a bottle, I'm not throwing it away - but I'm in no rush to use it up.