H&G's Aqua Flakes with a little bit of SoS, CalMag, & Roots Exelurator. Creates a very stable living system. Aqua Flakes runs great with a sterile setup too, and was actually designed for pure systems (0ppm base water). I would definitely suggest using CalMag along with it, if you're using distilled water, you'll have problems with CalMag pretty early on from my experience. Silica Blast is a great product to run with these as well. Good luck whatever you decide.