I prefer Canna, B.A.C. and GHE products.
These companies have been in the business for decades already and have their products well sorted, with great organic options and specific lines for hydro, coco coir and soil. Most are plenty strong enough for half doses to be all that is needed.
All these companies have complete nutrient formulas too, meaning you only have to buy 2-5 bottles and not 10+, and generally no mixing of Part A with Part B and Part C etc. and are super simple to use with outstanding results!
Also, most are really concentrated too, meaning you don't need to use much and a bottle of whatever will last multiple grows or many, many plants.
Hope this helps,.......
Organoman.