leak Detection dye?

[Pool Clown]

Just make sure that, once you use the Phenol red, to mark the bottle, and not use it for testing water anymore. When you squeeze the bottle, you get the dye. But when you stop squeezing the bottle, it will draw in pool water, diluting the Phenol and will give you skewed readings.

[Watermom]

Good reminder Pool Clown. Thanks for thinking to share that.