Carolyn from Riverview, Fl writes
There are no restrictions on how long you must wait to swim after an application of Crystal Blue Pond Colorant is made. We would recommend waiting a few hours or so after spraying so the product has time to distribute in the water. According to the manufacturer: Crystal Blue and Ocean Blue are food grade dye/colorants and are 100% safe for fish, animals, recreation, irrigation and potable water
Answer last updated on: 03/11/2019