Would help to get readings on ammonia, nitrites, nitrates, etc. Test kits are realatively cheap. I don't think the bare-bottom look is going to help you a lot on the cloudiness. That's a matter of taste. There are "vacuums" you can get if you find the poop too unsighlty. You know, that ten is going to be too small for your fish inside a year. Goldfish get way too big for a 10-gallon, even just one. They're beautiful, but as you can see, messy. Be sure they eat all food you put in within about 5 minutes. Otherwise the food decomposes and clouds the water. If they're not eating it all within that time, give them less per feeding.