Not cleaning your water tank regularly can lead to various health problems and unpleasant odors. Water tanks can accumulate dirt, algae, bacteria, and other contaminants that can affect the quality and safety of the water. These contaminants can cause diseases such as diarrhea, nausea, vomiting, fever, skin infections, and more. They can also produce bad smells and tastes in the water, making it unappealing to use.