Well, there's GH 3-part, but I don't really dig it for aero (again, very little mg at 800 ppms, too little), I have used "Super Bloom A and B," a 2-part nutrient, costs like 60 bucks for a gallon of each, and it gives great results in aero around 800 ppms. Here's a neat trick - whatever nutes you use, when the ppms drop, I add 1-2 tablespoons of epsom salts to the res, to get the nutes up to 800 ppms, and the plants turn a really dark green and seem to love it. Good luck, aero is the source, man, it outperforms everything else, and you really save $$$ on nutes and additives b/c you use so little.
