Sounds like you've already decided to go with Rachel, but let me give her another thumbs up - her nerites not only look cool, but man, they do a job on algae! After I removed my 12" pleco from my 65g Mbuna tank, I discovered the big guy had actually been cleaning it for me - I had a huge diatom algae outbreak. Everything took on a shade of brown. Rachel hooked me up with a couple zebra nerites and some BN plecos, and in less than two weeks every single surface was clean again. It was really cool to see where the nerites had gone over the rocks, it was like those old vacuum cleaner commercials. I should have taken pictures, but oh well, I suck. Though not as well as those nerites and BN plecos, LOL.