Complete High DPD Professional Test Kit
Taylor K-2005-6 2000 Complete™ kit for Chlorine/Bromine, pH, Alkalinity, Hardness, CYA (DPD–high range) (.75 oz bottles). Taylor formulates its reagents to remain effective for at least one year, with only very few exceptions (molybdenum indicator in liquid form is one; after four months old it should be tested against a standard periodically).