There are particles floating in my water heater and red rust like spots that appear on the inner vessel.

The particles that you see are various mineral deposits consisting of calcium, magnesium, iron and copper that can build up in the inner container. It is also known as limescale. The color can change and vary depending on the quality of water in your area. When the water is boiled, the minerals are left behind and end up building up on your water heater walls or sink to the bottom.

Mineral deposits that have crystallized can penetrate the stainless steel inner container and cause corrosion so we recommend using filtered water to avoid mineral deposit build up as well as citric acid cleaning solution to help maintain your water heater. Citric acid cleaner can also help avoid limescale build up that causes dispensing issues.