I am not a huge fan of bubbles in a tank to begin with, but on Friday night i set one up in my 20 gallon fry tank. yesterday when i came home from work my bedroom was drenched. i shouldn't really call it a flood, but i have had to rip the flooring out of my room, and we are waiting to see how bad the water damage is going to be on my sisters too. it was only 20 gallons of water and yet has made such a mess! what we think happened is one of my dogs must have bumped the air pump off the stand, disconnected the tube and then the air tubing created a siphon and slowly let all the water out.... has anyone had this happen before? what other alternatives are you using instead of bubbles to keep up your oxygen?