Ceriths are great, they're not the fastest eaters but they're dependable and cover everything. Good for general cleaning. Nassarius don't touch algae but will grab excess food within a minute or two, plus they turn up the sand a bit. Astrea turbos clean very well, including algae, but I've gradually lost mine as they get flipped over and can't recover. If you get them just plan on replacing them every few months. Hermits will also do a good general job, I recommend the red/scarlet kind over the blues as they're more passive (though less entertaining, if you like watching your inverts like I do). Hermits also enact a snail tax, they'll probably kill a snail every once in a while (I've lost ceriths and turbos, I don't think they're interested/capable of taking down nassarius). A couple of peppermint shrimp are also a nice addition, they grab excess food well and are nice for variety.