Check the listing for details. Refugium, WSR-16-3X5-G5 Hang on Refugium Sock Filter System. Condition: New. Listed at 199.99 USD. WATER STREAM REFUGIUM WSR-16-3X5-G5 Sock Refugium 2.5gallon (9.46L) Hang on Back of Aquarium Includes: Internal pump 132gph (500L) DC USB with Power Supply US PlugEmergency overflow1/2" Barb Inlet with Flow Director 12"- 1/2"OD Silicone tubing3X5 Mesh Filter Sock Removable Baffle Basket Screen Nylon screw level adjustment Size in PhotoSlide LED Light Mount For (WSR-S6PK9V) Chaeto LED Light Not Included Need 4 1/2” behind aquarium (recommend 5”) Refugiums are a great way to grow Algae for filtration, food, and provide excellent breeding grounds for pods, shrimp, and anything else that would otherwise be destroyed in your display tank. Great for macro algae like Chaetomorpha or Caulerpa. Recommend lighting. Mounts in built in light mount. https://www.ebay.com/itm/115293227954 WSR-S6PK9V FOR REFUNDS AND/OR RETURNS 30 Days from date of purchase.Buyer pays shipping both ways ( to the buyer and from the buyer ).Item or items must be fully intact as NEW withall labels and original packaging.After 30 Days refer to warranty.