ping pong ball. tried the theory to stop DE in a silver aro, didn't work FYI..... could a my dogs KONG ball do this? I was at work, but my girlfriend was home and she heard the dog playing with his ball hit the tank (ive seen him do this, but usually just bounces into the stand) and then 10 mins later or so BOOOOM it exploded. luckily she saved all the fish but they are crammed in a 55 gallon tank :/