{"product_id":"red-sea-expandeur-reefsense-4-ports","title":"Red Sea ReefSense 4-Port Expander — From 4 to 7 Probes on the ReefControl Pro","description":"\u003cp\u003eThe \u003cstrong\u003eReefSense 4-Port Expander\u003c\/strong\u003e takes a \u003ca href=\"\/en\/products\/red-sea-reefcontrol-pro\"\u003eReefControl Pro\u003c\/a\u003e from 4 to 7 probes — and it must be said upfront: per Red Sea's official guide, it requires a \u003cstrong\u003ePro\u003c\/strong\u003e, not a Lite. Connected to the Pro, it adds universal ports: any ReefSense probe plugs in — salinity, pH, ORP, temperature or leak detector — with no programming.\u003c\/p\u003e\n\n\u003ch2\u003eWho is it for, concretely?\u003c\/h2\u003e\n\u003cp\u003eThe growing system. Four ports fill up fast: pH, salinity, ORP, a leak detector — and there is no room left to watch the RO reservoir, a quarantine tank or a second temperature point. With the expander, the same controller covers up to 7 sensors, all visible in ReefBeat, each with its own alerts.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eDoes the expander work with the ReefControl Lite?\u003c\/h3\u003e\n\u003cp\u003eNo. Red Sea is categorical: the 4-port expander requires a ReefControl Pro. On a Lite you stay at 2 probes — that is the moment to move to the \u003ca href=\"\/en\/products\/red-sea-reefcontrol-pro\"\u003ePro\u003c\/a\u003e, and your probes follow you without recalibration.\u003c\/p\u003e\n\u003ch3\u003eWhat does 7 probes mean in total?\u003c\/h3\u003e\n\u003cp\u003eThe Pro's 4 ports plus the expander's ports: up to 7 ReefSense sensors on a single controller, all in the same app.\u003c\/p\u003e\n\u003ch3\u003eDo the expander's ports have limitations?\u003c\/h3\u003e\n\u003cp\u003eNo — they are universal like the controller's: every ReefSense probe keeps its calibration in onboard memory and plugs into any port.\u003c\/p\u003e\n\n\u003ch2\u003eWhy buy from ReefSolution\u003c\/h2\u003e\n\u003cp\u003eReefSolution is an authorized Red Sea dealer in Canada — no customs or exchange surprises. The expander pairs naturally with the \u003ca href=\"\/en\/products\/red-sea-reefsense-salinite-temperature\"\u003esalinity\u003c\/a\u003e and \u003ca href=\"\/en\/products\/red-sea-reefsense-temperature\"\u003etemperature\u003c\/a\u003e probes for extra monitoring points. Shipping across Canada and expert advice in-store in Laval.\u003c\/p\u003e","brand":"Red Sea","offers":[{"title":"Default Title","offer_id":47620876927147,"sku":"RSR35827","price":119.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0513\/7108\/1899\/files\/4portexpander__14970.1763052201.1280.1280.jpg?v=1786667566","url":"https:\/\/reefsolution.com\/en\/products\/red-sea-expandeur-reefsense-4-ports","provider":"Reef Solution","version":"1.0","type":"link"}