{"product_id":"sera-oxygen-test","title":"sera Oxygen Test","description":"\u003cp\u003eThe sera Oxygen Test (O2) is a quick, accurate reagent test for measuring the dissolved oxygen level in your aquarium or pond, in both freshwater and saltwater. Dissolved oxygen is essential for fish, invertebrates, and the beneficial bacteria in your filter, yet it is one of the most overlooked water parameters. This kit lets you confirm your tank is well oxygenated and catch problems before they stress or harm livestock. Pair it with the rest of our \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/water-testing\"\u003ewater test kits\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 #1E88E5;padding-left:8px;\"\u003eWhy test oxygen\u003c\/h3\u003e\n\u003cp\u003eOxygen keeps fish breathing, powers your biological filter, and supports healthy invertebrates and plants. Levels fall with higher temperatures, heavy stocking, overfeeding, at night when plants respire, and when surface agitation is low. A low reading is an early warning to increase aeration or circulation before your livestock suffer.\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 #1E88E5;padding-left:8px;\"\u003eHow to use\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRinse the test vial with the water to be tested\u003c\/li\u003e\n\u003cli\u003eAdd the sera reagents exactly as directed in the instructions\u003c\/li\u003e\n\u003cli\u003eCompare the resulting color against the sera color chart to read your dissolved oxygen level\u003c\/li\u003e\n\u003cli\u003eIncrease aeration or surface movement if the reading is low, then retest\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size:0.9em;color:#666;\"\u003eFollow the included sera instructions for exact drop counts and timing. Suitable for freshwater and marine aquariums and ponds.\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 #1E88E5;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:0.95em;\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003esera\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003e\u003cstrong\u003eMeasures\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003eDissolved oxygen (O2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003e\u003cstrong\u003eReagent volume\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003e2 x 15 mL, two reagents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003e\u003cstrong\u003eWater type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003eFreshwater and saltwater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003e\u003cstrong\u003eMethod\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003eReagent drops with color comparison\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;border:1px solid #BBDEFB;\"\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\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 #1E88E5;padding-left:8px;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does dissolved oxygen matter?\u003c\/strong\u003e Fish, invertebrates, and filter bacteria all need oxygen. Low levels cause stress, gasping at the surface, and can be fatal, so it is worth checking.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work in both fresh and saltwater?\u003c\/strong\u003e Yes, the sera Oxygen Test is suitable for freshwater and marine aquariums and ponds.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I raise low oxygen?\u003c\/strong\u003e Add aeration, increase surface agitation and circulation, avoid overstocking and overfeeding, and keep temperatures in range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow often should I test?\u003c\/strong\u003e Test regularly, and any time fish gasp at the surface, after adding livestock, or during warm weather.\u003c\/p\u003e","brand":"Sera","offers":[{"title":"Default Title","offer_id":48742897090779,"sku":"04914","price":21.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/sera-o2-square.jpg?v=1787485913","url":"https:\/\/squeakysaquatics.com\/products\/sera-oxygen-test","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}