Treat your plants to clean and pure water by using the Hydrologic Replacement Carbon or Coconut Filter in your Tall Boy and Tall Blue Water Filters. Now chloramines, iron, hydrogen sulphide, and heavy metals don't stand a chance against Hydrologic's newest offering in replacement filters. The KDF85 is the most advanced media that one can use when it comes to filtering water along with pre-treating water before reverse osmosis filters. This filter cartridge not only has incredible chlorine and chloramine removal capabilities but can also be successfully used for those on well or spring water sources to remove many other contaminants that can cause major problems in your garden. Water high in iron and sulfur can be very common problems that lead to decreased yield and quality. These contaminants can also quickly foul reverse osmosis membranes, so pre-treating the water and removing them is crucial to a properly operating filter system. Beneficial micro-organisms will thrive and be at their healthiest population by removing these harmful substances.