What you should test.
Both pool and tap or well water should be tested 1x year.
Well water should be tested 2x year, if a test has revealed nitrates or metals
Almost all water company utilities will furnish chemical analyses on their water on request; however, it is still necessary to test tap water for iron and copper, since these are often picked up from the water pipes between the treatment plant and your house.
Why you should test.
Test data, especially on your tap or fill water determines what pool treatment program is needed. Many common problems with pools result from failing to consider the chemistry of the fill water. Continued testing assures that water has not changed or is OK. We've learned the hard way that it can, sometimes without warning. Recent trends in water treatment can result in manganese in the tap water: though not toxic, manganese is a nightmare pool water contaminant, resulting in black or brown stains that are very difficult to remove.
Use a sample collection bottle
The ideal sample is at least one pint of water in a clean plastic dark colored bottle. A brown used hydrogen peroxide bottle makes a perfect sample bottle!
Cleaning a sample bottle
If your bottle is not clean, or is questionable, or hasn't been used since last year, clean it first.
Using a sample bottle.
Getting the sample tested
Collecting Collect your water sample after the pool pump has been running for at least one hour. Submerge the bottle at least 8" deep in front of your skimmer, invert, and allow it to fill with pool water. (Remember to rinse the bottle with pool water first!)
Test Guide (use the associated testform to take to your dealer)
Yr = test yearly Mn = test Mnth when open All = at each test
performed Only = test only when tap or well water indicated problem
Prob = test if you have problems after using Yellow Out, Yello Free,
Yellow Treat, or any product from United Chemical Company
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