Guardex / Pentair 4 in 1 test kit

Rainbow/Guardex 4 in 1 Combination Swimming Pool Test Kit.
Rainbow Guardex Test Kit – The extremely accurate liquid reagent system from Pentair – previoulsy known as Guardex. 
Rainbows Guardex Style 4-in-1 test kits have been the standard of the industry for decades. 4-in-1 tests for chlorine/bromine/pH, alkalinity and acid demand. 
This particular swimming pool test kit is able to test both free and total chlorine levels. 
Replacement reagents are also available on palmtreepools.net