If you need to know your swimming pool or spa’s pH level, then you must have phenol red. This product is an integral part of any testing kit. When applied, the liquid will change the water sample color so you can reference the chart included in your kit to get the results. The process is very fast so you can take quick readings and make better choices about how you maintain the water your family swims and relaxes in.
This product is a refill bottle to be used with our pH test kit. The other items in the kit can be reused so you can save money and generate less waste while you test! We offer two phenol red sizes, including a .5 oz. bottle and a 1 oz. bottle. The smaller quantity will fit in OTO pH test kits however the larger package offers a better value for your purchase. Please select your desired quantity using the dropdown box.