{"product_id":"crystal-blue-copper-sulfate-algaecide-granular-5-lb-aquatic-grade-for-pond-algae-control","title":"Crystal Blue Copper Sulfate Algaecide Granular — 5 lb Aquatic-Grade for Pond Algae Control","description":"\u003cb\u003eCrystal Blue Copper Sulfate Algaecide is a 99% granular copper sulfate pentahydrate formulated to control active algae blooms in larger ponds and aquatic systems.\u003c\/b\u003e\n\n\u003cp\u003eDesigned for use in substantial bodies of water where aggressive algae control is required, this 5-pound granular formula delivers concentrated copper ions that inhibit many common pond algae species. It is intended for targeted, seasonal treatments on actively growing algae when water temperatures are above 60°F. This product is not suitable for small decorative ponds, water features, pools, or waters containing sensitive species such as koi, goldfish, trout, or grass carp.\u003c\/p\u003e\n\n\u003ch3\u003eHow should I apply this copper sulfate to a large pond?\u003c\/h3\u003e\n\u003cp\u003eApply the granules directly to thick, floating mats of algae for the best immediate contact and visible reduction. Calculate dose based on water volume and the severity of the bloom, and treat in sections when necessary to avoid sudden oxygen loss from rapid vegetation die-off.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBroadcast granules evenly across heavy surface mats for fast contact.\u003c\/li\u003e\n  \u003cli\u003eTreat only active algae when water temperature exceeds 60\u0026amp;#176;F for optimal efficacy.\u003c\/li\u003e\n  \u003cli\u003eWork in phases for large infestations to prevent oxygen depletion.\u003c\/li\u003e\n  \u003cli\u003eFollow local regulations and label instructions for dosing and safety.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat safety precautions should be observed during use?\u003c\/h3\u003e\n\u003cp\u003eThis concentrated aquatic-grade product requires careful handling—use gloves, eye protection, and avoid direct skin contact or inhalation. Prevent runoff to downstream waters and never apply where prohibited by local environmental rules or where copper-sensitive fish are present.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWear protective gloves and eye protection during handling and application.\u003c\/li\u003e\n  \u003cli\u003eDo not use where koi, goldfish, trout, or grass carp are present.\u003c\/li\u003e\n  \u003cli\u003eAvoid application before heavy rain to reduce offsite movement.\u003c\/li\u003e\n  \u003cli\u003eStore in a cool, dry place out of reach of children and pets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich algae types and conditions respond best to this treatment?\u003c\/h3\u003e\n\u003cp\u003eThe formulation targets a broad range of freshwater algae, including filamentous and string varieties and nuisance swimmers’ itch organisms when applied to actively growing blooms. Results are most reliable on surface and near-surface algae masses rather than submerged vegetation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEffective against filamentous (string) algae and floating mats.\u003c\/li\u003e\n  \u003cli\u003eWorks best on actively growing algae in warm water conditions.\u003c\/li\u003e\n  \u003cli\u003eMost effective when applied directly to dense surface accumulations.\u003c\/li\u003e\n  \u003cli\u003eNot intended for use on plants sensitive to copper or in fish-stocked waters noted earlier.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this product for? Pond managers, municipal crews, agricultural users, and property owners responsible for larger aquatic systems will benefit most from Crystal Blue Copper Sulfate Algaecide. It is formulated for professional or experienced users who can measure water volume, follow label directions, and plan treatments to preserve aquatic health and oxygen balance. If you maintain a small decorative pond, backyard fountain, or any body of water containing copper-sensitive fish, choose a product specifically labeled for those uses instead.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this product in a pond with koi or goldfish?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Do not use in waters containing koi, goldfish, trout, or grass carp; these species are sensitive to copper.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: When is the best time to apply this algaecide?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Apply when algae are actively growing and water temperature is above 60°F, and treat in sections for large infestations.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Crystal Blue","offers":[{"title":"Default Title","offer_id":54587046101331,"sku":"B000RUN0T6","price":82.81,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1095\/4257\/2371\/files\/crystal-blue-front-packaging.jpg?v=1786698440","url":"https:\/\/findsworth.co.uk\/products\/crystal-blue-copper-sulfate-algaecide-granular-5-lb-aquatic-grade-for-pond-algae-control","provider":"Findsworth","version":"1.0","type":"link"}