I am planning to add pressurized CO2 to my 55 (230W, 165W running) this weekend and I believe I'll need to add ferts at the same time. I want to go the dry route and am just looking for suggestions on what to get from rexgrigg. Tank currently has some vals, sprites, hygro, and a purple plant that I traded for, but forgot the name of. Of course, I'm also growing algae quite well right now.