We are presenting pH Fix Indicator Strips, which are versatile tools commonly utilized to measure the pH level of varied liquids. These types of strips have narrow paper strips, which are coated with pH-sensitive compounds. By directly dipping the strip into a liquid, it goes through a colour change that parallels to the pH level of the solution. The variation of colour on the strip can thereafter be matched to a colour chart provided that enables convenient and quick pH determination. The presented strips have great usage in aquariums, industrial settings, laboratories, and educational institutions. Compact size, accuracy and simplicity of the pH Fix Indicator Strips make them invaluable to monitor alkalinity or acidity in a broad range of applications.