It’s been a battle trying to get things on even keep. Over the course of a couple of days, I dropped 17 gallons of nutes for RO, getting down to 190/500 on the Bluelab monitor. I know the Bluelab is reading high so the PPM was, realistically, 150 - 160 PPM. That’s less PPM than my tap water.
Same cycle - pH drops, I add Up, pH drops, I add Up, rinse, lather. repeat. Quick trip to nowhere.
A pattern that I saw was that as PPM drop, pH dropped more quickly. That’s a pattern I
think I saw, I should say. Figuring I had nothing to lose - it was either pix the pH or toss out that plants - I swapped in 4 gallons of 100% nutes. PPM went to 340 and 6.0. That was at 1405 and the entry in my grow journal -"Set a timer for 3:15 to watch the pH drop. "
The subsequent entry from my grow journal:
"Fuck me. pH went up.
Set another timer. "
pH had risen from 6.0 to 6.1 and stayed there from 1515 to 1630. Prior to that, pH was dropping 0.1 units every 60 - 70 minutes.
At that point I added another 11 ml of CM and then use Down to get to 5.8.
I do not want to muck with this res - pH appears to be stable which means that nutes are being taken up. I’m assuming that these Gelatos are somehow related to the plants that
@cjsbabygirl313 had to drench with CM so I’ve added quite a bit of CM. But (there’s always a “but”, eh?) that’s giving me Ca + Mg and, checking out the various sites re. deficiencies, I believe that I’m looking at an Mg deficiency not necessarily a Ca deficiency. Another item of interest is that more than one site has stated that a CM issue manifests 3 - 6 weeks after the deficiency actually occurs. That means that I could now be paying for not using enough CM a few weeks back and, yup, that checks out - I was using seedling strength when the plants had already moved into veg.
I can see new symptoms of Mg deficiency. I trimmed away the affected leaves yesterday and there are new sites so I’m not out of the woods yet. Despite my having added CM, what about adding Mg via Epsom salts?
It seems pretty simple - standard dosage is 2 tbps for each 5 liters of water. Any thoughts about that?
Another approach is a foliar spray. Never used a foliar spray but I’m willing to give it a shot if that’s a better approach than adding to the res.