You’ll see a difference. I bought some to use for making AACT. I had some clones start to yellow on me, so I mixed up a gallon because that was all I had with N in it. They were noticeably healthier the next day, so I started using it regularly. I use 2tsp per gallon, and the plants seem to like it a lot.
There’s a KNF recipe for making your own Fermented Fish nutes. If I can find enough fish scraps, I’m gonna try it. 