The single addition of Azamite to my mix was a huge help and made a big difference in my buds (growing other). It was night and day. I bought a 40lb bag from Orange County Farm Supply for $35-40 and it should last me a lifetime since only a small fraction is used as an amendment.
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Just my experience. Take it as you will
Humic Acid is a good addition also. But it costs a LOT unless you buy it from a farm supply, they have a  "diluted" version (I think they guy said 12% or something like that), but it is just as effective if you up the quantities just a touch.
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I had to ask for the humic acid because they keep it in the back for commercial use. It only cost me like $20-25 and should last for the rest of my life as a personal container grower.
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FWIW - I feel it is easier to see the difference in "other" plants through calyx ratios and size/quantity, etc. than it is to see the difference in a pepper. And in my experience with "other" plants, it is well worth it. (advice - buy in bulk to save a buck)