O-ring for Dolphin C-700 and C-1000 canister filters
The o-ring for the Dolphin C-700 and C-1000 canister filters is an important sealing component that keeps the filter operating with proper pressure and prevents leaks around the filter head. A secure o-ring ensures that water flows through the filtration system the way it should, helping maintain strong circulation and consistent performance.
Over time, o-rings can become worn, flattened or lose elasticity from regular use and cleaning. This can lead to dripping, reduced suction or unstable water flow. Replacing the old o-ring with the correct C-700 / C-1000 size restores a tight seal and brings your canister filter back to smooth, reliable operation.
Made from durable, aquarium-safe rubber, this o-ring is designed for a precise fit on both models and installs easily during routine maintenance. Keeping a spare o-ring on hand helps prevent downtime and makes servicing faster and more convenient.
Suitable for both freshwater and marine aquariums, this replacement o-ring supports healthy tank conditions by helping your filter maintain strong, steady water movement.