Aqua One Impeller Set – 550/750 Advance 401i

A brand new Aqua One 401i Impeller to fit the Aqua One Advance 550 and Advance 750 external canister filters. It’s a simple thirty second job to change this impeller and well worth doing as it’s the only moving part in the whole filter and subject to a fair bit of wear and tear as it spins at thousands of revolutions every minute of every day.