Well I cant say anything about Humboldt because i never use their product before...but i can say one thing , last time I went to the grow room to get more Dyna-Gro fertilizers. I noticed that Owner of this store pulled the Humboldt off the shelves because some of bottles actually bloated up, looks like it will going to be explode anytime soon ! and he said no more Humboldt for sure...thats reason Humboldt is pulled off froms shelves from some stores, who knows ?
I got your message...regard to Dyna-Gro, you should check Homebrewer's grow journal
https://www.rollitup.org/grow-journals/429438-dyna-gro-vs-advanced-nutrients.html Hes doing ebb and flow just like you...If you have any question, shoot him a PM, im pretty sure he will be glad to help ya out...just read his journal, he detailed everything in there, bro. and fun to read too
Happy growing