The quality of boiler water is an essential part of increasing boiler efficiency. Nevertheless, the most frequent type of failure is the corrosion of the boiler tubes due to improper treatment of feed water. Also, it can affect its performance, life, and cost of maintenance, risking boiler efficiency, making the treatment of the boiler water a key in the marine industry. Thus, the boiler water should be treated chemically or mechanically to maintain the proper boiler operation. This report will guide you through the problems and solutions for boiler water treatment.