As an Amazon Associate, we earn from qualifying purchases. Replacement Dissolved Oxygen Probe Membrane Kit - Bulk Reef Supply Neptune Systems . 209872 Gallery Attributes Brand name, Manufacturer name, ManufacturerNeptune Systems Extra Product NameReplacement Dissolved Oxygen Probe Membrane Kit - Bulk Reef Supply extendedQty, qtyInStock0 keywordssaltwater aquarium supplies, reef aquarium supplies, marine fish tank, live rock, GFO, protein skimmers, two part dosing, aquarium carbon, fish food, RO/DI Systems, ecotech marine, aquaillumination, neptune systems, kessil, innovative marine moq, multiple, tierMinQty11 MPN, SKU209872 qtySourceupdateFromUrlEntry snippetIf you have the Neptune Systems Dissolved Oxygen Probe, then this is the direct replacement kit for that probe. The replacement kit will include 5 membranes and cleaning solution. The DO probe is not a cheap item and by simply replacing the membrane within the probe it will act just like new again. We suggest changing out the probe's membrane every 3 months for best results. Sensor Membrane within the probe should be replaced every 3 months for best results. Dissolved oxygen can easily be manipulated with either air pumps and air stones, aiming return nozzles at the surface of the water, or a water pump that vertically pushes the water to the surface to allow for gas exchange. In a typical reef tank most O2 is lost and transferred with C tierPrice179.99 Distributor offers SellerSKUMOQIn stockMultiplePrices bulkreefsupply.com209872111 @ $79.99