AquaChek Blue - 25 Strips composition_Water-Based Acrylic with a 1-1/2 to 2

with a 1-1/2 to 2 inch dimension

They are designed to work with specific models of the Econ T

A bright LCD display shows ORP readings

They measure 41

Our ABS Polyethylene Spineboard is lightweight but extremely strong board

AquaChek Blue - 25 Strips composition_Water-Based Acrylic with a 1-1/2 to 2Fast, simple, safe and accurate. AquaChek Blue tests for Biguanide, Total Alkalinity, and pH. Ideal for customers who use biguanide as a sanitizer in their pool or spa. Biguanide is a chlorine free sanitizer such as BAQUACIL Chlorine Free Swimming Pool Sanitizer and Algistat, BaquaSpa Sanitizer, Softswim Bactericide, PolyClear. For a clean and healthy pool, test the water at each end a minimum of twice a week!