My Dragon Goby
 

Covers everything with sand, I think he's neat to watch, but sure make a mess. I have been thinking of giving him the boot, any takers. I am located in St.Albert.

After my goby killed 2 of my Lps corals, I got 2 black cucumbers .I haven't had to clean my sand in 2 years . Note . If chosing one , make sure it's working.

I've got a golden head goby (yellow head white body that u mentioned earlier) These do a great job cleaning up sand but do spread alot of sand around your tank. Also these are hard to keep alive and I would only recomend them in a mature tank of atleast 70 gallons. If u dont mind the mess they make and can keep one alive it would be well worth it, this is a very interesting fish.