I have several aquariums with gravel/pebble substrate and because I started a grow out 10 gallon for hatched albino Cory’s I used white aquarium sand. I am amazed how easy and clean the tank is. Any uneaten food and waste lays on top of the sand, so easy to vacuum it up. I would love to hear any pros or cons anyone has had with sand substrate. I am considering changing all my other tanks to sand.