I am using frozen brine atm, was debating getting the multipack last time I was at the LFS but went with these instead. I am also looking into getting a lawnmower blenny and a couple clowns in the next couple of weeks...and maybe a blue tang, i think he will do ok in the 30 gallon. i plan on getting a bigger tank in the next 6 months, maybe a 150, an RO/DI unit and then put the tang in the bigger tank then.