Keep in mind with a sandsifting goby that any clams said:Not with the diomand goby, this is one of the few that don't sift while swimming around and spread it on top of corals, they stay on the sand bed when doing so. Mine does a great job.
I kind of want to add a Yellow Watchman Goby eventially. Since I only have a 55 gallon tank said:Don't get the Yellow Watchman Goby... I had one and man did he become a problem. He got to the point where he would take a mouthful and go swimming... he killed a brain doing that.... Then it took me weeks trying to catch the little ba..... I thought he was quite beautiful and neat, but it is the one fish I truly regretted getting.