I did a bunch of research and settled on Red Sea's Reef Energy Plus AB+. I buy the big bottles and then pour a week's worth at a time into dosing pump container. I like that it stays good at room temp for a week and that you don't have to stir it. I've only gotten serious about growing SPS since February though, so please consider my advice here to be of the newbie variety. I'm interested to hear about what some of the master reef keepers on here recommend