All the benefits of barley straw without the mess! CrystalClear pure barley straw extract is the natural solution for clean and clear pond water year-round. First reported in the early 1990s, scientists discovered that during the decomposition process, barley straw releases a compound that improves water clarity. CrystalClear isolated that compound into an easy-to-use liquid barley extract for water clarity with no wait or mess. Currently, pond hobbyists can choose from three barley products: barley straw in bale form, barley pellets, and barley extract. With Barley Extract, there is no waiting for the barley to decompose into the powerful clarifying compound. Use one ounce of extract weekly to treat up to 500 gallons of water. For the best results, pour directly into your koi pond, water garden, patio water feature, or pondless waterfall. When used as a preventive measure, barley straw offers pond owners an alternative to chemical products to manage water quality. Consistent treatments will reduce the time spent on pond cleaning and routine maintenance. No temperature restrictions, so you can use it anytime in spring, summer, fall, and winter. When used as directed, our simple treatment will not harm any plants, fish, pets, or wildlife. Safe for use with pond equipment, including filtration systems, aeration units, skimmers, liners, and fountains. CrystalClear products care for your pond properly, resulting in a cleaner and more balanced ecosystem. We offer many great solutions to help fix your pond problems, from muck removers to beneficial microbe treatments —Trust CrystalClear for all your pond supplies. FAQs How does barley straw work? Barley straw decays in the presence of oxygen and sunlight. This process releases natural compounds that help clean and clear water. When using Barley Extract, there is no waiting for the barley bales or pellets to decompose. Is Barley Extract a chemical? Barley Extract is not a synthesized chemical. This product contains only all-natural compounds derived from fermenting real barley straw. Does this product have a temperature restriction? No, the CrystalClear Barley Extract does not have a temperature restriction and may be used all year to clear pond water. Will this product work to immediately clear my pond? While the extract starts working on contact, it takes time for results to be visible. Patience and consistent treatment will improve your water quality over time. If I double the dose, will it clarify the water twice as fast? No, you will achieve optimal results by following the listed dosage rate. Will this product clear green water? No, this product is not an algaecide and is not intended to clear green water. Barley Extract is a natural product that will help clarify pond water and maintain balance. If you’re looking for algae control, we recommend CrystalClear Algae D-Solv and CrystalClear AlgaeOff, both of which are EPA-registered algaecides.