I thought you grew with chicken shit? The problem with powders is it kills soil and coco cation exchange capacity. I grew in coco with powders and would have salt buildup problems near the end of flower if I didn’t flush I even a week with a tea or molasses water.
I grow commercial and at home (check my channel). I use Advanced Nutrients, Master Line except for Bud Factor X & Flawless Finish. Cost for a 500 plant flower cycle grown in coco is costing me thousands .. or about what I would expect to sell 3 pounds of top shelf flower for at approx $2400 per pound.
Well, I use General Hydroponics Nutrients, CoCo Coir/Perlite mix with a Drain to waste setup, But I run it back through over and over again, until I have a gallon left and then I feed my house plants outside. I then mix up another 3 gallon batch. Yes, I have had Great Grows, Please check them out, I have another video coming up later this month.
I would say that liquids have the advantage when it comes to dosage. Handling dosages in units of volume are far easier for most than dealing with units of mass.