{"product_id":"hydrothol-191-granular-aquatic-herbicide-algaecide-for-ponds","title":"Hydrothol 191 Granular — Aquatic Herbicide \u0026 Algaecide for Ponds","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eHydrothol 191 Granular is an aquatic herbicide and algaecide designed to address common pond nuisances. This formulation combines a concentrated endothall salt (Endothall 11.2%) with a fast-acting delivery, making it practical for controlling stubborn weeds and algae in a variety of water bodies. While a liquid option exists for some applications, the granular form is widely used by commercial applicators who follow local permitting requirements. Use when growth is active to maximize effectiveness and monitor conditions that can affect results.\u003c\/p\u003e\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\u003cp\u003eHydrothol 191 Granular targets broad spectrum aquatic growth, helping clear muddied waters and reduce overgrowth that can impede recreation. It is valued for its quick dissipation in the environment and its suitability for slow-moving water, such as drainage channels and irrigation ditches. This makes it a versatile tool for lake, pond, and canal maintenance.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBroad spectrum action on algae and weeds that occur in freshwater systems\u003c\/li\u003e\n\u003cli\u003eEffective in marginal zones and near shorelines where growth is most problematic\u003c\/li\u003e\n\u003cli\u003eWorks well in murky water because it does not bind to suspended sediment\u003c\/li\u003e\n\u003cli\u003eShort environmental half-life when applied correctly, reducing long-term residues\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy Hydrothol\u003c\/h3\u003e\u003cp\u003eBeyond its capability to reduce nuisance growth, Hydrothol is part of a broader strategy to maintain water quality and access for recreational use. By controlling algae blooms and weed mats, you may notice clearer water and safer conditions for swimming, boating, and fishing. The product has been used for decades, often in rotation with other treatments or as an alternative to copper where appropriate. This historical track record comes with careful, professional application and adherence to regulations.\u003c\/p\u003e\n\u003ch3\u003eHow to apply\u003c\/h3\u003e\u003cp\u003eBecause applications should be performed by qualified commercial applicators, it is important to follow the label and local rules. Treatments are typically planned to occur outward from shore or in strips to prevent trapping fish. When used as directed, Hydrothol can help you address specific problem areas while preserving overall ecosystem balance.\u003c\/p\u003e\n\u003ch3\u003eSafety and environmental notes\u003c\/h3\u003e\u003cp\u003eHydrothol dissipates relatively quickly in the environment and is designed to minimize bioaccumulation in fish or soil. Susceptibility varies with algae subtypes and environmental conditions. Use as part of a comprehensive management plan that considers water quality, habitat, and local guidelines.\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: What is Hydrothol 191 Granular used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: A broad-spectrum aquatic herbicide and algaecide designed to control weeds and algae in lakes, ponds, and slow-moving waters when applied by qualified applicators.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are there safety considerations for use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, follow label directions, ensure proper permits where required, and apply treatments outward from shore to protect fish and non-target species.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"United Phosphorus Inc","offers":[{"title":"Default Title","offer_id":45737634529466,"sku":"B00QXNR7AE","price":306.6,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/3536\/8890\/files\/hydrothol-191-granular-bag.jpg?v=1774627807","url":"https:\/\/gardencanada.ca\/products\/hydrothol-191-granular-aquatic-herbicide-algaecide-for-ponds","provider":"Garden Canada","version":"1.0","type":"link"}