}); We are sorry. LawnStar Chelated Liquid Iron (32 OZ) for Plants - Multi-Purpose, Suitable for Lawn... 0.02% Aqueous Phenol Red Solution, 100mL - The Curated Chemical Collection, Potassium Dichromate 0.100 Normal Quart (950 mL). AmazonUIPageJS : P).load.js('https://images-na.ssl-images-amazon.com/images/I/21r8get0MeL.js?AUIClients/DetailPageWirelessPlansAssets&ScGh6pE5#312547-T1.304946-T1'); Top subscription boxes – right to your door, © 1996-2020, Amazon.com, Inc. or its affiliates. Please use a different way to share. 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Crystal Blue Copper Sulfate Algaecide - Aquatic Grade Granular Pond Algae Control - 5 lbs $26.99 (430) Special offers and product promotions. It's also much cheaper than proprietary chemicals (window.AmazonUIPageJS ? “Crystal Blue products are awesome!!! Order at Amazon. }); Treatment of aquatic weeds and algae can result in oxygen loss from decomposition of dead algae and weeds. Sold Out. 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Quantity. (window.AmazonUIPageJS ? Read honest and unbiased product reviews from our users. Sanco Industries KoiWorx Blue Dye - Ornamental and Decorative Pond Dye, Water Featu... Copper (II) Sulfate Solution, 1M, 500mL - The Curated Chemical Collection. The crystal Blue smart crystals contain a very low concentration of copper sulfate. (window.AmazonUIPageJS ? Copper sulfate comes in several forms depending on how finely it is ground. (window.AmazonUIPageJS ? Copper Sulfate Smart Crystals. Tools & Garden Garage Sale. Copper sulfate (or Copper Sulphate) is an artificial compound that combines sulfur with copper. (window.AmazonUIPageJS ? It works by coming in direct contact with algae. 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