hmmm, ooook, drats! lol Next question: Do gobys have to be paired with a shrimp or is that just "one of those things" that just happen so to speak. I need somethingn to sift the sand around 'cuz im tired of sterilizing my hand and arm and sifting it by hand. ugh. I need more occupants for this tank I know but I'm liited in funds. oh well, tax time!!!! and crabs other than hermits and those starfish things are unfortunately not an option for this tank.