Replacement tubing designed specifically for the Neptune DOS dosing and fluid metering system allows users to extend their setup flexibility by increasing the distance between pumps, reservoirs, or directly to the tank. Available in two lengths—4 meters and 16 meters—to accommodate various aquarium configurations and needs, this tubing is crucial for maintaining accurate chemical delivery without compromising on efficiency or performance. This product is ideal for advanced reef aquarists who require precise dosing solutions to maintain optimal water conditions and ensure healthy coral growth.