thedwightguy;55742 said:These little Giant air pumps, packed with sand! as a sound deadener, were the standard of the industry for years and years. In the sixties they were just about the only serious air pump stocked by aquarium shops.
Penn Plax as a company didn't even exist then!
Trouble free, they ran forever. you were more likely to damage them by dropping them on the floor than wearing them out!