Yes, a water filter can help with hard water. Hard water is water that has a high mineral content, and it can cause a variety of problems. It can make your skin and hair feel dry and it can also leave behind deposits on your fixtures and appliances. A water filter can help to remove these minerals, and it can also help to improve the taste of your water. There are a variety of water filters on the market, and you can choose one that is specifically designed to remove minerals from your water.