I'm same way I think DWC a little above my thinking have always used Promix HP with good success.I try to use it 2 grows before I discard it.I give it to my landlords wife for her flower garden.This last grow I noticed the babies did not look as robust I think it had left over nutrients n hurt my seedlings.From now on only use it once.2  3.8 cubic feet bags are ,90$ so it kinda expensive but it always worked good for me