{"product_id":"tunze-osmolator-3-auto-top-off","title":"Tunze Osmolator 3 Auto Top Off","description":"\u003cp\u003e\u003cstrong\u003eNever chase salinity swings again.\u003c\/strong\u003e The Tunze Osmolator 3 automatically replaces the fresh water your aquarium loses to evaporation, holding your water level, and with it your salinity, rock steady around the clock. An optical sensor watches the level and the quiet Turbelle high-jet metering pump tops off exactly what is needed, drop by drop, for tanks from 5 to 180 gallons.\u003c\/p\u003e\n\u003cp\u003eIt is the full-size sibling to the \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/tunze-255603-osmolator-3-nano-auto-top-off\"\u003eOsmolator 3 Nano\u003c\/a\u003e, built for larger displays and sumps. Explore more \u003ca href=\"https:\/\/squeakysaquatics.com\/collections\/salt-water\"\u003ereef and marine gear\u003c\/a\u003e to round out your system.\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 #666;padding-left:8px;\"\u003eHow it works\u003c\/h3\u003e\n\u003cp\u003eThe magnet-mounted optical sensor reads your water level to within 0.5mm. When evaporation drops the level, the controller runs the metering pump to add reverse-osmosis water from your reservoir until the set point is restored. Built-in safety logic caps how long the pump can run, so a stuck sensor or an empty reservoir will not overfill the tank or run the pump dry.\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 #666;padding-left:8px;\"\u003eWhat is in the box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOsmolator 3 optical sensor with magnet holder\u003c\/li\u003e\n\u003cli\u003eTurbelle high-jet 5000.020 metering pump\u003c\/li\u003e\n\u003cli\u003e12V DC power supply\u003c\/li\u003e\n\u003cli\u003eTube and tube holder\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 #666;padding-left:8px;\"\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAutomatic top-off keeps water level and salinity stable\u003c\/li\u003e\n\u003cli\u003eOptical sensor accurate to 0.5mm\u003c\/li\u003e\n\u003cli\u003eQuiet Turbelle high-jet metering pump for precise, gentle dosing\u003c\/li\u003e\n\u003cli\u003eSafety shutoff guards against overfilling and dry running\u003c\/li\u003e\n\u003cli\u003eFits aquariums from 5 to 180 gallons\u003c\/li\u003e\n\u003cli\u003eDelivers up to 6.2m (20.3ft) of head height for tall stands and remote reservoirs\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 #666;padding-left:8px;\"\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse:collapse;width:100%;font-size:0.95em;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eTunze\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eOsmolator 3 (253426)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eTank range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e5 to 180 gallons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003ePump\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eTunze 5000.020 metering pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eMax delivery height\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e6.2 m (20.3 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eTubing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e6mm OD \/ 3.9mm ID, 3 m length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eSensor accuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e0.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003e\u003cstrong\u003eMade in\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd;padding:6px 10px;\"\u003eGermany\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\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 #666;padding-left:8px;\"\u003eOsmolator 3 vs Osmolator 3 Nano\u003c\/h3\u003e\n\u003cp\u003eChoose this full-size Osmolator 3 for aquariums up to 180 gallons, sumps, and taller stands. For nano and desktop tanks, the compact \u003ca href=\"https:\/\/squeakysaquatics.com\/products\/tunze-255603-osmolator-3-nano-auto-top-off\"\u003eOsmolator 3 Nano\u003c\/a\u003e covers smaller volumes at a lower price.\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 #666;padding-left:8px;\"\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFreshwater or saltwater?\u003c\/strong\u003e Both. It keeps the water level steady on any aquarium, which matters most on reef and marine tanks where evaporation changes salinity.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a separate reservoir?\u003c\/strong\u003e Yes. The Osmolator pumps from a container of RO or RO\/DI water you keep nearby, topping off the tank as it evaporates.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size tank is it for?\u003c\/strong\u003e Aquariums from 5 to 180 gallons. For smaller nano tanks, see the Osmolator 3 Nano.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it hard to set up?\u003c\/strong\u003e No. Mount the sensor with the included magnet holder, set the pump and reservoir, and the controller runs the top-off automatically.\u003c\/p\u003e","brand":"Tunze","offers":[{"title":"Default Title","offer_id":49138937397467,"sku":"253426","price":249.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/5209\/3403\/files\/253426-tunze-osmolator-3-auto-topoff-fr.jpg?v=1786716203","url":"https:\/\/squeakysaquatics.com\/products\/tunze-osmolator-3-auto-top-off","provider":"Squeaky's Aquatics","version":"1.0","type":"link"}