When i first set up my tank, i based my experiences on my freshwater tanks, and i had no idea how big a problem the algae would be, and how long it takes to add fish, so i threw a couple damsels and a basslet in with LRLS, thinking "hey its only 3 little fish in a 29g, thats nothing in a FW tank..." no cleaning crew or anything, so my tank ended up like the green tank in finding nemo... LFS recommended LMB, and wham! he ate all the diatoms off the glass, mowed the hair algae, and with just him, a sand sifter and 4 crabs, my tank is spotless! he's now my personal hero, and ill never have a tank without one.
BTW, haven't had to feed the fat pig at all... he just swims around and nibbles the little algae tufts all day and only seems to get fatter.