I'll be following this thread. Just around to cracking my Elmer's this week, and got perfect germ rate of 4/4. I also use similar setup using FN Bloom, FP and also koolbloom liquid and dry. Quick question for ya testy, I noticed my previous bottle of FNB always mixed up to 5.2 pH at 1.3EC but my new bottle is a full point lower at same EC at 4.2ph. I even double checked my meter with calibration solution. I did notice that when I checked some nuts solution that I mixed up to 5.5ph two days prior, it was now 6.0 and that was just sitting in a bucket. Have you experienced this variable pH from bottle to bottle with FN and also do you mix and let it sit out a few days before feeding?
Yo Smokey! Good to have you on board. I have never noticed any fluctuations with my FN Bloom and I do not let it sit before feeding. I have a circulation pump constantly going in my res and just add water, food, or supplements as needed to maintain the ppm/ph I'm looking for.
One time though, I had a routine to use the exact same measurement of FNB every time I mixed up a new batch. I did this for months and didn't use my pH meter anymore. Plants started looking sick all the sudden and when I measured the pH, it was like 4 something. Long story, short... I was on city water and apparently they changed water sources with the seasons. The summer and winter water being delivered to my house was like .7-.8 different by season. Doubt that's your issue, but it was about this time of year. Good luck bro!