{"product_id":"polyplab-genesis-rock-2-pack","title":"PolypLab Genesis Rock (2 Pack)","description":"\u003cp\u003e\u003cstrong\u003ePolypLab Genesis Rock\u003c\/strong\u003e is biological filter media in the shape of a rock: a 4 x 4 x 1 inch block of 100% fired ceramic with more than 23,000 square feet of bacterial surface area per rock. Drop one in the sump and you add a huge, stable home for the nitrifying and denitrifying bacteria that keep ammonia, nitrite, nitrate and phosphate in check. This 2 pack covers up to 700 gallons and works in saltwater, reef and freshwater systems. Seed it with \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/polyplab-genesis-bacterial-blend-50ml-live-reef-bacteria\"\u003eGenesis Bacterial Blend\u003c\/a\u003e, or grab the \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/polyplab-genesis-rock-pack-4-ceramic-bio-media-blocks-reef\"\u003e4 pack\u003c\/a\u003e for larger systems, and browse the rest of our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/filter-media-cartridges\"\u003efilter media\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eWhy Genesis Rock\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMassive surface area:\u003c\/strong\u003e each rock adds 23,000 square feet or more of colonizable surface, far beyond what live rock or plastic media of the same footprint can offer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated to 350 gallons per rock:\u003c\/strong\u003e the 2 pack supports systems up to 700 gallons, so even a large reef only needs a couple of blocks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100% fired ceramic, zero leach:\u003c\/strong\u003e fired at over 600 degrees so nothing leaches into the water and the block stays inert for the life of the tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks three ways:\u003c\/strong\u003e place it for aerobic, anaerobic or mixed filtration depending on which nutrient you want to target.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLowers phosphate and organics:\u003c\/strong\u003e a larger bacterial population consumes more dissolved organics and binds more phosphate, taking pressure off your skimmer and media reactor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and stackable:\u003c\/strong\u003e the flat 4 x 4 x 1 inch blocks sit in a sump chamber, a media basket or a refugium without rearranging plumbing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eRinse the rocks well with RO\/DI or other purified water before use.\u003c\/li\u003e\n\u003cli\u003eFor a faster start, soak them for 12 hours or more in a bacterial supplement such as \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/polyplab-genesis-bacterial-blend-50ml-live-reef-bacteria\"\u003eGenesis Bacterial Blend\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eChoose a placement: \u003cstrong\u003eaerobic\u003c\/strong\u003e (above the water line with a gentle trickle of about 40 GPH over the rock) for ammonia and nitrite removal; \u003cstrong\u003eanaerobic\u003c\/strong\u003e (a low-flow sump area) for nitrate reduction; or \u003cstrong\u003emedium flow\u003c\/strong\u003e for a balance of both.\u003c\/li\u003e\n\u003cli\u003eGive the bacteria a few weeks to colonize, then watch your nutrient tests trend down.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;max-width:640px;font-size:0.95em;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003ePolypLab\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e\u003cstrong\u003eProduct\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003eGenesis Rock, 2 pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e100% fired ceramic, zero-leach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e\u003cstrong\u003eSurface area\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e23,000+ sq ft of bacterial surface per rock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e\u003cstrong\u003eRock size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e4 x 4 x 1 in, about 1.5 lb each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e\u003cstrong\u003eRated capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003eUp to 350 gallons per rock (700 gallons per 2 pack)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e\u003cstrong\u003ePlacement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003eAerobic, anaerobic or medium flow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003e\u003cstrong\u003eWater type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #B2EBF2;padding:6px 10px;vertical-align:top;\"\u003eSaltwater, reef and freshwater aquariums\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e2 Genesis Rock ceramic bio-media blocks\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/polyplab-genesis-bacterial-blend-50ml-live-reef-bacteria\"\u003ePolypLab Genesis Bacterial Blend\u003c\/a\u003e, live bacteria to seed the rock\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/polyplab-genesis-rock-booster-set-bacteria-ceramic-bio-media-reef\"\u003ePolypLab Genesis Rock Booster Set\u003c\/a\u003e, rock plus bacteria in one kit\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/products\/polyplab-genesis-rock-pack-4-ceramic-bio-media-blocks-reef\"\u003ePolypLab Genesis Rock 4 Pack\u003c\/a\u003e, for systems over 700 gallons or heavier stocking\u003c\/li\u003e\n\u003cli\u003eMore \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/filter-media-cartridges\"\u003efilter media\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin:14px 0 4px;font-size:1.05em;font-weight:600;line-height:1.25;border-left:4px solid #006064;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow many rocks do I need?\u003c\/strong\u003e PolypLab rates each rock for up to 350 gallons, so the 2 pack handles most home systems. Heavily stocked tanks or systems fighting nitrate benefit from more rocks in a low-flow spot.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I have to cure or soak it first?\u003c\/strong\u003e No curing. Rinse it with purified water and place it. A 12 hour soak in a bacterial supplement is optional but speeds up colonization.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work in freshwater?\u003c\/strong\u003e Yes. PolypLab designs Genesis Rock for fresh or saltwater systems; the bacteria that colonize it are the same ones that run any aquarium's nitrogen cycle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it change my water chemistry?\u003c\/strong\u003e No. The block is fully fired ceramic with zero-leach technology, so it does not add phosphate, silicate or anything else to the water.\u003c\/p\u003e","brand":"PolypLab","offers":[{"title":"Default Title","offer_id":49314961555675,"sku":"R-00001","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/Polyp04362.jpg?v=1789559300","url":"https:\/\/squeakysaquatics.com\/products\/polyplab-genesis-rock-2-pack","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}