NEPTUNE SYSTEMS DOS HEADCAP REPLACEMENT PUMP HEAD ESV Aquarium Products like this:

like this:

One simple connection links the DDR to the DŌS

To connect your FS-100 Flow sensor

Pretty cool

as a high-level warning sensor in your sump

NEPTUNE SYSTEMS DOS HEADCAP REPLACEMENT PUMP HEAD ESV Aquarium Products like this:Direct OE replacement fluid metering head assembly for the Neptune DOS Fluid Metering System. The easy to install head replaces the tubing, roller, and plastic housing head cap. Installs in minutes Replaces wearable tubing The Neptune DOS Replacement Head assembly comes with everything to replace the current fluid metering head on your DOS system. Over time the self lubricating tubing will start to age, and can also cause excess resistance and