Kolor Kut Water Finding Paste is used to test for the presence of water in the bottom of oil tanks. The brown paste can be applied to string or a rod and lowered into the tank, when it comes in contact with water the paste will turn red.
The Proactive GoPro 0.45 Micron Groundwater Filter is used for filtering metals out of water.
Filter: Polyether Sulphone Media, 700 cm2 capacity
Inlet: 3/8" barb with threads