Solaxx MET20A SafeDip 6 in 1 Electronic Test System

Collect water in the onboard cup and press start button to take reading Features large digital LCD display, easy push-buttons, water resistant housing, and built-in sample cup Measures pH, free chlorine, salt, total dissolved solids, ORP, and temperature Memory function automatically stores the previous measurement for easy comparison LED indicator light illuminates if pool is safe to swimYou may also like ProTeam Spa Metal Magic 1qt 6pk Remove Iron, Copper, Silver and Manganese in Spa.