Pump making noise, Bubbler not working need help fast!

Nov 26, 2008
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The pump is making noises, but the bubbler isn't working. How do I fix it? This is not my tank, I just inherited the responsiblity and have become fond of the fish. The tank is about 6 feet long, 2 feet tall and a foot wide. There are 2 koi in it , one about 6 inches long, the other 3 inches, a 6 inch pleco, and 3 other goldfish kind of critters. The tank is really in good shape, the fish are healthy; but my tank owners are not around.