Bottled bloom boosters promising higher THC are selling you phosphorus and potassium with a nicer label. Plants need those in flower, but once the basic need is met there is no evidence that piling on more raises cannabinoid content, and overdoing it locks out other nutrients. A plain feeding chart that works for most THC seeds is up on https://potentthcseeds.com (https://potentthcseeds.com) and it deliberately leaves out the additive bottles. My best tested plant in years ran on a basic two part nutrient and nothing else.