{"product_id":"sera-co2-start","title":"Sera CO2-Start","description":"\u003cp\u003eThe \u003cstrong\u003eSera CO2-Start\u003c\/strong\u003e is a simple, beginner-friendly CO2 fertilization system for planted freshwater aquariums up to about \u003cstrong\u003e120 liters (32 US gallons)\u003c\/strong\u003e. Carbon dioxide is the most important nutrient for aquarium plants, and adding it promotes lush, healthy growth while gently shifting pH toward the slightly acidic range many plants and fish prefer. The set pairs a discreet CO2 diffusion reactor with sera CO2-Tabs plus, so you can start dosing CO2 without pressurized cylinders or complicated equipment. Part of our planted-tank \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/freshwater-aquarium-plants\"\u003eaquarium plants\u003c\/a\u003e range.\u003c\/p\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.06em;font-weight:600;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eHow It Works\u003c\/h3\u003e\u003cul style=\"margin:4px 0 4px 18px;line-height:1.55;\"\u003e\n\u003cli\u003eA CO2-Tab is placed in the in-tank diffusion reactor, where it releases carbon dioxide that dissolves into the water for your plants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo pressurized CO2 cylinder required,\u003c\/strong\u003e so it is easy to set up and run.\u003c\/li\u003e\n\u003cli\u003eIdeal for the popular smaller planted tanks up to 120 L \/ 32 US gal.\u003c\/li\u003e\n\u003cli\u003eBoosts plant growth and helps establish a stable, slightly acidic pH.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.06em;font-weight:600;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eWhat Is Included\u003c\/h3\u003e\u003cul style=\"margin:4px 0 4px 18px;line-height:1.55;\"\u003e\n\u003cli\u003esera CO2 diffusion reactor (mounts discreetly inside the aquarium)\u003c\/li\u003e\n\u003cli\u003esera CO2-Tabs plus (the CO2-generating tablets)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.06em;font-weight:600;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eFeatures\u003c\/h3\u003e\u003cul style=\"margin:4px 0 4px 18px;line-height:1.55;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eBeginner-friendly,\u003c\/strong\u003e easy to install and operate with no previous experience needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiscreet\u003c\/strong\u003e reactor that blends into the aquascape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder-free\u003c\/strong\u003e CO2, powered by refillable tablets.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in Germany\u003c\/strong\u003e by Sera.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.06em;font-weight:600;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\u003ctable style=\"border-collapse:collapse;width:100%;max-width:560px;margin:6px 0;font-size:0.95em;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;background:#E3F2FD;font-weight:600;\"\u003eSystem\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eCO2 diffusion reactor + CO2-Tabs plus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;background:#E3F2FD;font-weight:600;\"\u003eBest for\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003ePlanted aquariums up to 120 L \/ 32 US gal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;background:#E3F2FD;font-weight:600;\"\u003eWater type\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eFreshwater (planted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;background:#E3F2FD;font-weight:600;\"\u003eConsumable\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003esera CO2-Tabs plus (refill tablets)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;background:#E3F2FD;font-weight:600;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eSera\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;background:#E3F2FD;font-weight:600;\"\u003eOrigin\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #BBDEFB;padding:6px 10px;\"\u003eMade in Germany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.06em;font-weight:600;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eRecommended Pairings\u003c\/h3\u003e\u003cul style=\"margin:4px 0 4px 18px;line-height:1.55;\"\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/freshwater-aquarium-plants\"\u003eLive aquarium plants\u003c\/a\u003e to put the extra CO2 to work\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/additives-supplements\"\u003ePlant fertilizers and additives\u003c\/a\u003e for balanced nutrition\u003c\/li\u003e\n\u003cli\u003esera CO2-Tabs plus refills to keep the system topped up\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3 style=\"margin:16px 0 6px;font-size:1.06em;font-weight:600;border-left:4px solid #1E88E5;padding-left:8px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp style=\"margin:6px 0;\"\u003e\u003cstrong\u003eDo I need a CO2 cylinder?\u003c\/strong\u003e\u003cbr\u003eNo. The CO2-Start uses tablets, so there is no pressurized cylinder to buy or refill.\u003c\/p\u003e\u003cp style=\"margin:6px 0;\"\u003e\u003cstrong\u003eWhat size tank is it for?\u003c\/strong\u003e\u003cbr\u003eIt is designed for smaller planted aquariums up to about 120 L \/ 32 US gallons.\u003c\/p\u003e\u003cp style=\"margin:6px 0;\"\u003e\u003cstrong\u003eIs this for freshwater or saltwater?\u003c\/strong\u003e\u003cbr\u003eFreshwater planted aquariums.\u003c\/p\u003e\u003cp style=\"margin:6px 0;\"\u003e\u003cstrong\u003eHow does CO2 help my plants?\u003c\/strong\u003e\u003cbr\u003eCarbon dioxide is the key plant nutrient. Adding it supports stronger growth and helps maintain a stable, slightly acidic pH.\u003c\/p\u003e","brand":"Sera","offers":[{"title":"Default Title","offer_id":49067492901083,"sku":"08039","price":59.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/sera-co2-start.jpg?v=1785958007","url":"https:\/\/squeakysaquatics.com\/products\/sera-co2-start","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}