I have only one clown in my 125gal that I got as a trade.. We also got a flower pot that the clown has fallen in love with. He also does that burrowing.. But he's the only one in the tank. He's been hosting the flower pot till the past week when he's removing the sand around the flower pot. I don't get it... Here are some pictures of it..
"But let there be spaces in your togetherness and let the winds of the heavens dance between you. Love one another but make not a bond of love: let it rather be a moving sea between the shores of your souls."-Khalil Gibran