The FTK3 has all the same capabilities as the FAM1 filter, plus it has a special insert for hard water treatment. It uses a two-stage system to effectively purify your water. The first stage is a textile-based system which removes physical impurities including dirt, sand, rust, and metal pieces from pipes. The second stage uses bacteriostatically treated granular activated carbon to remove dissolved substances including chlorine, radon, heavy metals, organic substances, detergents, and pesticides. It also improves the taste, clarity, and color of water.
The hard water treatment drastically reduces mineral deposits, which is great for appliances like coffee makers, tea pots, and espresso machines. It's also good for people, as hard water can lead to kidney stones and skin problems.