Add to Cart Quick view Duo Test Kit MSRP: Now: $21.99 Was: Liquid solution kit to check your levels of Bromine/Chlorine and PH. MSRP: Now: $21.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity of Duo Test Kit Increase Quantity of Duo Test Kit Price: MSRP: Now: $21.99 Was: Subtotal: Add to Cart