{"product_id":"90311skr-seaklear-90-day-algaecide-algae-prevention-remover-1-gallon","title":"90311SKR | SeaKlear 90 Day Algaecide Algae Prevention \u0026 Remover 1 Gallon","description":"\u003cp data-end=\"833\" data-start=\"101\"\u003eThe SeaKlear 90-Day Algae Prevention \u0026amp; Remover (1 Gallon, SKU 90311SKR) is a highly concentrated algaecide formulated to kill and prevent multiple algae types—including blue-green, green, yellow and black—for up to three months per treatment when used in properly balanced pool water. Featuring a low-dose copper complex (approx. 11.8% copper sulfate pentahydrate, 3% elemental copper) it delivers long-term residual protection, is non-foaming and non-staining when applied as directed. This product is ideal for service professionals or informed DIYers seeking a “set-and-forget” algaecide for their pool water maintenance every 90 days.\u003c\/p\u003e\n\u003ch3 data-end=\"851\" data-start=\"835\"\u003eHighlights\u003c\/h3\u003e\n\u003cul data-end=\"1783\" data-start=\"852\"\u003e\n\u003cli data-end=\"1019\" data-start=\"852\"\u003e\n\u003cp data-end=\"1019\" data-start=\"854\"\u003e\u003cstrong data-end=\"887\" data-start=\"854\"\u003eExtended Algae Control Cycle:\u003c\/strong\u003e One application lasts up to 90 days and includes a no-algae guarantee when used per instructions in properly balanced pool water.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1196\" data-start=\"1020\"\u003e\n\u003cp data-end=\"1196\" data-start=\"1022\"\u003e\u003cstrong data-end=\"1056\" data-start=\"1022\"\u003eBroad-Spectrum Algae Efficacy:\u003c\/strong\u003e Targets and prevents blue-green, black, yellow, mustard, and traditional green algae—delivering versatile performance across algae types.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1385\" data-start=\"1197\"\u003e\n\u003cp data-end=\"1385\" data-start=\"1199\"\u003e\u003cstrong data-end=\"1237\" data-start=\"1199\"\u003eNon-Foaming, Non-Staining Formula:\u003c\/strong\u003e Designed to maintain clarity and appearance of surfaces without causing foam build-up, pool liner marks, or other staining when used as directed.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1563\" data-start=\"1386\"\u003e\n\u003cp data-end=\"1563\" data-start=\"1388\"\u003e\u003cstrong data-end=\"1416\" data-start=\"1388\"\u003eLow-Dose Copper Complex:\u003c\/strong\u003e Formulated with approximately 11.8% copper sulfate pentahydrate (~3% elemental copper) for sustained residual protection and proven performance.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1783\" data-start=\"1564\"\u003e\n\u003cp data-end=\"1783\" data-start=\"1566\"\u003e\u003cstrong data-end=\"1604\" data-start=\"1566\"\u003eEconomical \u0026amp; Simplified Treatment:\u003c\/strong\u003e Routine dosage is only 16 fl oz per 10,000 gallons every three months, reducing maintenance frequency and simplifying your service schedule.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"114\" data-start=\"89\"\u003e\u003cstrong data-end=\"114\" data-start=\"92\"\u003eDirections for Use\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"261\" data-start=\"242\"\u003e\u003cstrong data-end=\"261\" data-start=\"245\"\u003eDosage Rates\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"304\" data-start=\"263\"\u003e\u003cstrong data-end=\"304\" data-start=\"267\"\u003eEvery 3 Months (Algae Prevention)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"439\" data-start=\"305\"\u003eUse \u003cstrong data-end=\"321\" data-start=\"309\"\u003e16 fl oz\u003c\/strong\u003e of \u003cstrong data-end=\"364\" data-start=\"325\"\u003eSeaKlear Algae Prevention \u0026amp; Remover\u003c\/strong\u003e for every \u003cstrong data-end=\"393\" data-start=\"375\"\u003e10,000 gallons\u003c\/strong\u003e of pool water\u003cbr data-end=\"410\" data-start=\"407\"\u003e(\u003cstrong data-end=\"437\" data-start=\"411\"\u003eor 500 ml per 40,000 L\u003c\/strong\u003e).\u003c\/p\u003e\n\u003cp data-end=\"471\" data-start=\"441\"\u003e\u003cstrong data-end=\"471\" data-start=\"445\"\u003eSevere Algae Treatment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-end=\"603\" data-start=\"472\"\u003eUse \u003cstrong data-end=\"488\" data-start=\"476\"\u003e32 fl oz\u003c\/strong\u003e of \u003cstrong data-end=\"531\" data-start=\"492\"\u003eSeaKlear Algae Prevention \u0026amp; Remover\u003c\/strong\u003e for every \u003cstrong data-end=\"560\" data-start=\"542\"\u003e10,000 gallons\u003c\/strong\u003e of pool water\u003cbr data-end=\"577\" data-start=\"574\"\u003e(\u003cstrong data-end=\"601\" data-start=\"578\"\u003eor 1 L per 40,000 L\u003c\/strong\u003e).\u003c\/p\u003e\n\u003cp data-end=\"635\" data-start=\"610\"\u003e \u003c\/p\u003e\n\u003cp data-end=\"635\" data-start=\"610\"\u003e\u003cstrong data-end=\"635\" data-start=\"613\"\u003eGeneral Directions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-end=\"1248\" data-start=\"637\"\u003e\n\u003cli data-end=\"727\" data-start=\"637\"\u003e\n\u003cp data-end=\"684\" data-start=\"639\"\u003eKeep pool water pH between \u003cstrong data-end=\"681\" data-start=\"666\"\u003e7.2 and 7.8\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul data-end=\"727\" data-start=\"687\"\u003e\n\u003cli data-end=\"727\" data-start=\"687\"\u003e\n\u003cp data-end=\"727\" data-start=\"689\"\u003eFor severe algae, lower pH to \u003cstrong data-end=\"726\" data-start=\"719\"\u003e7.2\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"779\" data-start=\"728\"\u003e\n\u003cp data-end=\"779\" data-start=\"730\"\u003eMaintain total alkalinity between \u003cstrong data-end=\"778\" data-start=\"764\"\u003e80–120 ppm\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"845\" data-start=\"780\"\u003e\n\u003cp data-end=\"845\" data-start=\"782\"\u003eMake sure the pool’s \u003cstrong data-end=\"844\" data-start=\"803\"\u003efiltration system is running properly\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"877\" data-start=\"846\"\u003e\n\u003cp data-end=\"877\" data-start=\"848\"\u003e\u003cstrong data-end=\"866\" data-start=\"848\"\u003eBrush the pool\u003c\/strong\u003e regularly.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"947\" data-start=\"878\"\u003e\n\u003cp data-end=\"947\" data-start=\"880\"\u003e\u003cstrong data-end=\"893\" data-start=\"880\"\u003eCalculate\u003c\/strong\u003e how much product your pool needs based on its volume.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1132\" data-start=\"948\"\u003e\n\u003cp data-end=\"1031\" data-start=\"950\"\u003eAdd the product \u003cstrong data-end=\"996\" data-start=\"966\"\u003edirectly into the deep end\u003c\/strong\u003e, ideally near a \u003cstrong data-end=\"1028\" data-start=\"1013\"\u003ereturn line\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul data-end=\"1132\" data-start=\"1034\"\u003e\n\u003cli data-end=\"1132\" data-start=\"1034\"\u003e\n\u003cp data-end=\"1132\" data-start=\"1036\"\u003eFor pools with \u003cstrong data-end=\"1071\" data-start=\"1051\"\u003eplaster finishes\u003c\/strong\u003e, dilute the product in a bucket of pool water before adding.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1248\" data-start=\"1133\"\u003e\n\u003cp data-end=\"1248\" data-start=\"1135\"\u003eThis product \u003cstrong data-end=\"1206\" data-start=\"1148\"\u003emust be used together with an EPA-registered sanitizer\u003c\/strong\u003e (like chlorine) to help control bacteria.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"537\" data-end=\"556\"\u003eAdditional Info\u003c\/h3\u003e\n\u003cp data-start=\"557\" data-end=\"959\"\u003eThis section provides answers to the most common questions customers ask in store about the SeaKlear 90-Day Algae Prevention \u0026amp; Remover (90311SKR). It explains how this long-lasting copper-based formula works, how to apply it correctly, and what to know before visiting Discount Pool Mart to pick up your seasonal algaecide. Use it to ensure you purchase the right product for three-month algae control.\u003c\/p\u003e\n\u003ch2 data-start=\"961\" data-end=\"1010\"\u003eCompatibility, Pool Balance \u0026amp; Algae Prevention\u003c\/h2\u003e\n\u003cp data-start=\"1011\" data-end=\"1217\"\u003eSeaKlear 90-Day Algaecide is designed for pools that need reliable, long-term algae prevention using a low-dose copper complex. These answers help customers confirm compatibility before purchasing in store.\u003c\/p\u003e\n\u003ch4 data-start=\"1218\" data-end=\"1290\"\u003eHow can I confirm this 90-day algaecide is compatible with my pool?\u003c\/h4\u003e\n\u003cp data-start=\"1291\" data-end=\"1645\"\u003eSeaKlear’s copper-based formula works with chlorine, salt, and mineral systems, and is safe for plaster, vinyl, fiberglass, and pebble finishes. Proper water balance—especially pH and total alkalinity—is important for preventing staining and ensuring optimal performance. Staff at Discount Pool Mart can help you verify your chemistry before application.\u003c\/p\u003e\n\u003ch4 data-start=\"1646\" data-end=\"1701\"\u003eWill this treat all common algae types in my pool?\u003c\/h4\u003e\n\u003cp data-start=\"1702\" data-end=\"1932\"\u003eYes, this formula is designed to target green, blue-green, yellow\/mustard, and even black algae. For pools that experience recurring blooms, customers often pair this algaecide with brushing and shock during the initial treatment.\u003c\/p\u003e\n\u003ch4 data-start=\"1933\" data-end=\"1989\"\u003eDoes the 90-day treatment really last three months?\u003c\/h4\u003e\n\u003cp data-start=\"1990\" data-end=\"2190\"\u003eWhen water is properly balanced and circulation is functioning, the copper complex remains active for the full 90-day cycle. Heavy rains, high bather load, or neglected chemistry may shorten duration.\u003c\/p\u003e\n\u003ch2 data-start=\"2192\" data-end=\"2234\"\u003eApplication, Dosage \u0026amp; Water Maintenance\u003c\/h2\u003e\n\u003cp data-start=\"2235\" data-end=\"2338\"\u003eThese answers help customers understand how to apply SeaKlear 90311SKR and what to expect after dosing.\u003c\/p\u003e\n\u003ch4 data-start=\"2339\" data-end=\"2388\"\u003eHow much product do I need for my pool size?\u003c\/h4\u003e\n\u003cp data-start=\"2389\" data-end=\"2611\"\u003eThe standard dosage is 16 fl oz per 10,000 gallons every 90 days. For a 20,000–30,000 gallon pool, most customers purchase one gallon to complete multiple seasonal treatments. Accurate gallonage ensures proper performance.\u003c\/p\u003e\n\u003ch4 data-start=\"2612\" data-end=\"2676\"\u003eIs this product safe for vinyl liners and colored surfaces?\u003c\/h4\u003e\n\u003cp data-start=\"2677\" data-end=\"2853\"\u003eYes, when used as directed and applied to balanced water. Maintaining pH between 7.2–7.6 prevents the copper from precipitating on surfaces, ensuring a non-staining experience.\u003c\/p\u003e\n\u003ch4 data-start=\"2854\" data-end=\"2909\"\u003eDo I have to shut down the pool after application?\u003c\/h4\u003e\n\u003cp data-start=\"2910\" data-end=\"3039\"\u003eNo downtime is required. Add the product near a return jet while the pump is running, and the pool can be used shortly afterward.\u003c\/p\u003e\n\u003ch2 data-start=\"3041\" data-end=\"3079\"\u003eIn-Store Pickup \u0026amp; Seasonal Planning\u003c\/h2\u003e\n\u003cp data-start=\"3080\" data-end=\"3174\"\u003eThese questions help customers time their purchase and prepare for long-term algae prevention.\u003c\/p\u003e\n\u003ch4 data-start=\"3175\" data-end=\"3253\"\u003eIs SeaKlear 90311SKR available for same-day pickup at Discount Pool Mart?\u003c\/h4\u003e\n\u003cp data-start=\"3254\" data-end=\"3390\"\u003eMost stores keep this product stocked during spring, summer, and fall. Calling ahead with the SKU helps confirm stock before you arrive.\u003c\/p\u003e\n\u003ch4 data-start=\"3391\" data-end=\"3452\"\u003eWhen should I apply my 90-day dose for the best results?\u003c\/h4\u003e\n\u003cp data-start=\"3453\" data-end=\"3611\"\u003eCustomers often add the product at the beginning of each season or after major cleanings. Applying before peak heat helps prevent algae before it establishes.\u003c\/p\u003e\n\u003ch4 data-start=\"3612\" data-end=\"3671\"\u003eShould I pair this with other chemicals during pickup?\u003c\/h4\u003e\n\u003cp data-start=\"3672\" data-end=\"3817\"\u003eYes, for best results customers typically purchase shock, brush attachments, and test kits during the same visit to support proper water balance.\u003c\/p\u003e","brand":"SeaKlear","offers":[{"title":"Default Title","offer_id":50916233838880,"sku":"90311SKR","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/3326\/9536\/files\/90311SKRSeaKlear90DayAlgaecideAlgaePrevention_Remover1GallonDiscountPoolMart_1.jpg?v=1766079255","url":"https:\/\/discountpoolmart.com\/products\/90311skr-seaklear-90-day-algaecide-algae-prevention-remover-1-gallon","provider":"Discount Pool Mart","version":"1.0","type":"link"}