When I was stuck on bottles I started looking closely at the ingredients that they contained.
You may be able to do the same through simple internet searches.
Anyway, I noticed a single ingredient that was very consistent in the products I was using & reading about for the specific purpose of increasing trichome density.
The product I recognized in all the formulas was simply kelp. Specifically, nodosium (if that's right) kelp.
As far as bottles go.. Bcuzz bloom... best out there.. I use bottles indoors n there is a notable difference with this product included... but like mjpassion said its basically kelp... it's also an older product that stood the test of time... Fuk all those newer products with the cannabis grower in mind, secret ingredients, if they advertise with names like terpinator that should be a red flag They are snake juice or toxic , proper nutrition n dialed environment n what's needed,