{"product_id":"aquarium-co-op-easy-undergravel-filter-system","title":"Aquarium Co-Op Easy Undergravel Filter System","description":"\u003cdiv style=\"background:#E8F5E9;border-left:4px solid #1B5E20;padding:10px 14px;margin:0 0 14px;font-size:0.95em;\"\u003e\n\u003cstrong\u003eSold in-store only.\u003c\/strong\u003e Not available for online purchase.\n\u003c\/div\u003e\n\u003cp\u003eThe \u003cstrong\u003eAquarium Co-Op Easy Undergravel Filter System\u003c\/strong\u003e is a modern, modular take on the classic undergravel filter. Interlocking plates sit beneath your gravel and, powered by nothing more than an air pump, gently pull water down through the entire substrate bed. That turns your whole gravel layer into a giant biological filter while keeping water moving so detritus and dead spots never build up. Browse more of our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/air-pumps-accessories\"\u003eair pumps and accessories\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1B5E20;padding-left:8px;\"\u003eHow It Works\u003c\/h3\u003e\n\u003cp\u003eAn air stone inside each uplift tube creates a column of rising bubbles. As the bubbles lift water up and out of the tube, fresh water is drawn down through the gravel to replace it. Beneficial bacteria living throughout the substrate get a constant supply of oxygen and waste to process, giving you powerful, silent biological filtration with no filter box hanging on the tank.\u003c\/p\u003e\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1B5E20;padding-left:8px;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul style=\"margin:4px 0 0;padding-left:20px;line-height:1.5;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eFully modular:\u003c\/strong\u003e Connect the plates with dovetail tabs to build a grid that fits almost any tank footprint, then add or remove plates as needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhole-substrate biofiltration:\u003c\/strong\u003e The entire gravel bed becomes living filter media for a huge boost in beneficial bacteria.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir powered and silent:\u003c\/strong\u003e Runs on a standard air pump, with no motor or intake box inside the tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtendable uplift tubes:\u003c\/strong\u003e Easy Flow uplift tubes can be stacked taller for deeper aquariums.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1B5E20;padding-left:8px;\"\u003eSetup\u003c\/h3\u003e\n\u003cp\u003eStart with a bare-bottom tank. Lay out the modular plates to cover the footprint you want, connecting them by sliding each dovetail into the matching tab. Before connecting every plate, slide the uplift tubes onto the row you want them on and fit each air collar with an air stone using a short piece of airline tubing. Finish connecting the plates, then cover everything with 1 to 2 inches of gravel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e the included air stones ship with an extra spacer disk, so remove one disk per air stone for the best fit. Use a gravel of at least 5mm grain size. \u003cem\u003eUndergravel systems are not designed for sand, soil, or other fine substrates.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1B5E20;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;margin:4px 0 0;font-size:0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;background:#E8F5E9;padding:6px 10px;font-weight:600;width:42%;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;padding:6px 10px;\"\u003eAquarium Co-Op\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;background:#E8F5E9;padding:6px 10px;font-weight:600;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;padding:6px 10px;\"\u003eModular air-driven undergravel filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;background:#E8F5E9;padding:6px 10px;font-weight:600;\"\u003ePlates Included\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;padding:6px 10px;\"\u003e20 plates (covers 11 x 27.75 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;background:#E8F5E9;padding:6px 10px;font-weight:600;\"\u003ePlate Size\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;padding:6px 10px;\"\u003e2.75 x 5.5 in, 9\/16 in thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;background:#E8F5E9;padding:6px 10px;font-weight:600;\"\u003eUplift Tube Height\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;padding:6px 10px;\"\u003e19 in, extendable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;background:#E8F5E9;padding:6px 10px;font-weight:600;\"\u003ePower\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;padding:6px 10px;\"\u003eAir pump required (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;background:#E8F5E9;padding:6px 10px;font-weight:600;\"\u003eSubstrate\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;padding:6px 10px;\"\u003eGravel 5mm or larger, 1 to 2 in deep\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;background:#E8F5E9;padding:6px 10px;font-weight:600;\"\u003eAvailability\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #A5D6A7;padding:6px 10px;\"\u003eIn-store only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1B5E20;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul style=\"margin:4px 0 0;padding-left:20px;line-height:1.5;\"\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/aquatop-breza-battery-air-pump-ac-sensor\"\u003eAquatop Breza Air Pump\u003c\/a\u003e to drive the uplift tubes.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/aquatop-at4par-premium-clear-airline-tubing-13ft\"\u003eAquatop Premium Airline Tubing\u003c\/a\u003e to connect the air pump to each air collar.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/hikari-bacto-surge-foam-filter-sponge-freshwater-saltwater\"\u003eHikari Bacto-Surge Sponge Filter\u003c\/a\u003e to add even more biological filtration on the same air pump.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:16px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #1B5E20;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need an air pump?\u003c\/strong\u003e\u003cbr\u003eYes. The filter is driven entirely by air, so you will need an air pump (and a length of airline tubing) to run it. The kit includes the air stones.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it with sand or aquasoil?\u003c\/strong\u003e\u003cbr\u003eNo. Undergravel filters need water to flow freely through the substrate, so they require gravel at least 5mm in size. Sand, soil, and fine substrates will clog the plates.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow big a tank does one kit cover?\u003c\/strong\u003e\u003cbr\u003eOne kit includes 20 plates covering about 11 by 27.75 inches. For larger tanks you can combine kits, and for deeper tanks the uplift tubes can be extended.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it good for a planted tank?\u003c\/strong\u003e\u003cbr\u003eIt works best in gravel-based community, fry, and quarantine setups. Heavily root-fed planted tanks usually prefer a nutrient substrate, which is not compatible with undergravel flow.\u003c\/p\u003e","brand":"Aquarium Co-Op","offers":[{"title":"Default Title","offer_id":48840409055451,"sku":"29413","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/image_f3d8c994-a316-4303-a07b-f9da430986b0.jpg?v=1780589536","url":"https:\/\/squeakysaquatics.com\/products\/aquarium-co-op-easy-undergravel-filter-system","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}