I had, 2. Unfortunately I made the mistake of not starting out with healthy gobies.
They're sandsifters. They don't really eat large food items. They're much more fond of worms and insect larvae which can be found in the substrate. I fed mine well on bloodworm (live and frozen), white worms and grindals along with the live brine shrimp they would reluctantly take.
When the fish reaches 8 or 9" you really need to find a new home for it. They should be kept in tanks with a large footprint. 4'x2' absolute minimum. For one, since they require space to move around and a soft sand substrate for them to dig around in.
If you cannot provide a tank that large it should find new home.