I'm not saying you're wrong, but I'm sticking with soil just because it is more forgiving. As far as being "all over the place", I reduced a set feeding schedule to 25% of the original - not really a breakthrough idea or anything. All based on recommendations from on here. So I don't see where the reference applies.Here is my $.02. I think you would learn a lot with this approach. I'm not saying you are doing bad, plants look good, but you are all over the place man. There is no way in hell you will be able to decipher what is doing what.
I'd go coco, and use a base nute for veg and one for bloom. Sit back and wait for a deficiency to pop up. And start learning from square one.
The kelp and fish stuff is pretty self explanatory, here's the back of the other three and what they are marketed as. All seem to address specific micro-nutes (need or not, who knows) microbes and amoebas and shit. These were all part of a "12-pack" of junk, I am using them because they are the "extra recommended" stuff on the feeding schedule - I am sure it is a marketing thing and haven't bought a second bottle of anything except the BigBloom.Reading up on your products I am not familiar with... Can you take a picture of the back of "Boomerang Comeback"