Sooo I'm doing a water change using buckets and a powerhead for like the 2nd time instead of the ole python today. Using a penguin 660 I have laying around it takes like 5 minutes to pump a 5 gallon bucket 3 feet. So the hose is under the water level in the tank held on with a suction cup by the time I'm doing the last bucket and when it got down to where the water was just covering the powerhead I unplugged the powerhead and walked away I don't remember why. When I came back to pour the last 3 inches into my tank, the bucket was an inch from the top; it had siphoned back and was seconds from emptying my 90g tank onto the floor :duh:
