sand sifting star vs. hector goby vs. conch

[intarsiabox]

I have a diamond goby (Valenciennea puellaris) that does a fantastic job of keeping the sand white. Mine has stayed small and tends to spit out the sand just above the bed rather than carrying it up into the water column like other gobies. The goby can get up to 6" but mine hasn't grown over 3", you may have to move it to a larger tank down the road if it does get big. They are common in Edmonton but call around for prices, the same fish ranged in price from $20 to $60 depending on the store. They will also eat regular fish food. Mine was shy and didn't do much for 2 weeks but now he is always cleaning and never hides.