{"product_id":"frog-serene-bromine-in-line-cartridge","title":"FROG® Serene Bromine Cartridge | In-Line Spa Systems","description":"\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eFROG® Serene Bromine In-Line Cartridge\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eis the bromine-releasing cartridge for spas equipped with the FROG\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eSerene In-Line System\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— FROG's bromine-based water care line, built directly into the spa's filter compartment. It's the consumable that does the daily sanitizing work, releasing a steady, low level of bromine to keep your water clean and clear between water changes.\u003c\/p\u003e\n\u003cp\u003eFor spa owners who prefer bromine over chlorine, Serene delivers the same \"set it and forget it\" approach FROG® is known for, applied to a different sanitizer chemistry. The cartridge uses\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eTime Release Bromine Technology\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e— bromine that releases gradually as the water flows through, holding a steady, gentle level instead of the spikes and dips of dosing tabs or granules by hand. Paired with FROG® minerals, the result is cleaner, clearer, softer water using up to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e50% less bromine and chlorine\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ethan traditional methods.\u003c\/p\u003e\n\u003cp\u003eThis is the replacement bromine cartridge for the Serene In-Line setup, so keeping one on hand means you're never caught with a spent cartridge and water drifting out of balance. Each cartridge runs about 3–4 weeks depending on use, so most owners go through roughly a dozen of these per year — a strong fit for autoship.\u003c\/p\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\n\u003cstrong\u003eWhy Time-Released Bromine Matters:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eManually adding bromine tabs to a floater or dosing granules creates an inconsistent sanitizer level — too high right after dosing, too low before the next addition. A time-released cartridge holds the bromine level steady, which means cleaner water, less chemistry chasing, and a gentler experience on skin and swimwear.\n\u003cdiv class=\"lti-pro-tip\"\u003e\n\u003cstrong\u003e\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"lti-pro-tip\"\u003e\n\u003cp\u003e\u003cspan role=\"img\" aria-label=\"®\"\u003eFROG®\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"FROG","offers":[{"title":"Default Title","offer_id":31711946670135,"sku":"74361","price":18.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2507\/5288\/files\/FROG__Serene_Bromine_Cartridge.jpg?v=1779991489","url":"https:\/\/leisuretimeinc.com\/products\/frog-serene-bromine-in-line-cartridge","provider":"Leisure Time Inc.","version":"1.0","type":"link"}