- You cannot add "Guardex DPD 4-in-1 Test Kit for Residential Pool & Spa Testing No Longer Available" to the cart because the product is out of stock.
#2 Guardex Phenol Red Indicator Reagent
ITEM #: 26242GDX | List Price: $5.94
#2 Guardex Phenol Red Indicator Reagent for testing PH levels in a Guardex test kit.
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