It's just blue colored water. It does not help determine if the galvanized metal has lost its integrity. waste of money.
3Pcs 500Ml CVNDKN Wash Bottles W/ Scale -16 Oz: Plastic Safety Lab Squeeze Bottle
13 Review
Valchoose LDPE Economy Wash Bottle, Narrow Mouth Squeeze Bottle Medical Lab Plastic, Safety Squeeze Bottle No Spill, Bend Mouth Watering Cans (500Ml / 16Oz / 1 Bottle)
14 Review
Get 24 Pack Of 4 Oz. Amber Boston Round Glass Bottles With Droppers From GBO GLASSBOTTLEOUTLET.COM
11 Review
Get Your All-Purpose Cleaning Solution With Bealee'S 24 Oz Plastic Spray Bottles - 2 Pack
16 Review