Agree 100% with
@Billy the Mountain.
I grow in hydro and used Fox, switched to Botanicaire, and then went to a dry fertilizer. The biggest issue was that, regardless of the pretty pictures on the label, they all provide the same 16 (18?) chemicals to the plants and, second, it doesn't make a lot of sense to pay FedEx to schlep a gallon of water+tiny amounts of chemicals.
On that basis, I switched to Jack's 3-2-1 a couple of years ago and haven't looked back.
They sell a variety of different sized bags so you don't have to buy a Costco-sized bag. I bought 25 pounds of Part A and a 25 pound bag of Part B and store them in Home Depot buckets + air tight lids. I'm 68 years old and suspect that I now have enough ferts for the rest of my life.
My cost breakdown:
That's $1.18 for 28 gallons of nutrient solution.
Results - excellent but, to be blunt, the biggest variable in the growing equation is the grower's ability to not dick things up.
Feed plants lightly, give them as much light as they can tolerate, and LTFA and the results are amazing.