I'm not saying they aren't good products. If you are starting from scratch with a soil medium, then yes, might buy some. Load up with 5/2 ratio "kelp" and humus/Fulvic Acid at flower and you will get more production. The more experience you get under your belt, the less and less you will need to purchase these products. Organics will support its microbes after a certain point.
Feed the microbes, they feed the plant.
Hell, I used Miracle Grow and Mega Crop together this last run. lol
Add it to Hydro,
not sure about that, haven't been a hydro fan. But have been thinking hard about it.
Somebody will chime in.