Check the listing for details. Algaefix, 2.5-Gal.. Condition: New. Listed at 217.80 USD. Our eBay Store Contact Us Add to Favorite Sellers Algaefix, 2.5-Gal. 2.5 Gallon, Algaefix, Effectively Controls Many Types Of Green Or Green Water Algae, String Or Hair Algae & Blanketweed In Ponds That Contain Live Plants, Controls Existing Algae & Helps Resolve Additional Algae Blooms, Keeps Ornamental Ponds & Water Gardens Clean & Clear. effectively controls many types of green or green water algae, string or hair algae and blanketweed in ponds that contain live plants. controls existing algae and helps resolve additional algae blooms. keeps ornamental ponds and water gardens clean & clear. K Hardware Stores is made up of 4 True Value Hardware Stores that have been in business for over 100 years. K Hardware understands customer service & quality products. Let us help meet your needs while in the comfort of your own home.