Any updates on this? Curious to hear how it turned out.
Turned out to be a pathogen. The Liquid Kool Bloom had severe mold growing in the concentrate. Contaminated batch from the manufacturer. Which has been occurring a lot. I keep getting Floraduo A & B’s from the growshop that have fully solidified crystalization in the concentrates. Softball size chunks in a brand new bottle.
As for the LKB, it killed half the crop. I’ve completely removed it from the program. Especially since General Hydro has admitted to me that they’ve been having problems with its stability & it reacting negatively to nitrates in a recirculated hydro system. And this appears to be a universal problem with many PK booster products.
LKB seems to have only been tested on drain-2-waste before it was brought to market.
Since removing the LKB, guess what, no more pH drops either. Way healthier plants in all zones. Better yields. LKB sucks.