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Pool Dye Test

When you jump in a pool you assume the water is clean, chemically treated, filters, and safe…everywhere.  I’m not just talking about the water near the inlets or around the main drains, I’m talking clean and safe water everywhere in the pool.  Have you every stopped to wonder if there’s a test to ensure adequate distribution of water circulation in the pool?  Well some jurisdictions require a visual test to prove each pool is without a “dead spot” of water, even the Model Aquatic Health Code references (section 4.7.1.3.3.5) dye tests as a means to “…evaluate the mixing characteristics of the recirculation system.”  But what does this look like and how does it work?

After a pool is constructed, and prior to receiving operational permit, a non-permanent, non-staining colored dye is added to the pool’s surge tank or skimmer systems.  Almost immediately, dye will be seen returning through the pool’s inlets.  The pool will quickly turn a purple hue and you can easily see how all the water distributes within the pool.  After approximately ten (10) minutes, the entirety of the pool should be colored and the test is complete.  A short while thereafter, the dye will disappear when chlorine is added back into the pool.

For those who would like to test your own facility, this is an easy visual test to ensure you’re providing a safe and chemically treated aquatic experience for your patrons and staff.

Enjoy this time lapse video of a facility in Europe testing their facility.

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