Safe additive to water for training

[Capt. Larry Jarnagin]

What's the best thing (safe) to add to water to track flow? I'm looking for something highly visible to show how effective our dam/diking and diverting efforts are.

[JOHN H. TAGG]

NOT SURE IF YOU MAY NEED THE INFORMATION NOW BUT BEING NEW TO THE SITE. YOUR TEAM USES A PRODUCT CALLED LIQUID POWDER TRACING DYE FROM NORLAB INC. 1-800-247-9422. WE ALSO USE THESE WHEN WE NEED TO RUELOUT A SOURACE OR A LINE.