when looking for nutrients take into mind the N-P-K ratio, as well as if it's organic/ORMI listed. I'm currently using fox farm ocean forest soil and organic fish/kelp liquid nutes, and dolomite lime for cal/mag and ph balance in soil.
Get some Fox farms Big bloom and some Tiger bloom. It’s cheap, and works well. Just make sure you check your PH before and after adding tiger bloom, i always start tiger bloom at 1/4 strength of what the bottle says. it tends to lower your PH quite a bit sometimes. My water can be 7ish and after tiger bloom it’s at around 5.0-5.5. Get some PH up and Ph down to adjust accordingly. She’s probably gonna die if you don’t feed nutes soon.