DIAMOND GOBY.
I've placed one in a guys tank the other day and his 75 gal sand has been spotless!
They sift the sand through their mouth and out through their gills.
And yes they are jumpers, just keep the lid of the tank on. Goodluck=)
Pour water in the filters to get it going.
Pull out the empeller with the magnet and rinse the magnet beccause sometimes it gets jammed and clean it. and adjust it till it stops making noise.
My opinion:
I've installed a "Bow shaped" tank in a dental office about 6months ago and everyone loves it!
The set up replicates finding nemo, the kids are very intrigued.
Fishes like the tomato clown, yellow tang, cleaner shrimp, etc.
Do a major water, take about 75% out. Its only been about 3 months so it's not that big of a deal.
Whatever the problem is, it's probably rid of after the change.