http://hardsoftwater.com/swimming-pool-water-problems-and-testing/ Hard and soft water provides information on water filter, softener and water purification or treatment systems Mon, 12 Mar 2018 01:26:40 +0000 hourly 1 https://wordpress.org/?v=6.9 http://hardsoftwater.com/swimming-pool-water-problems-and-testing/#comment-45220 Tue, 08 Mar 2016 23:08:19 +0000 http://hardsoftwater.com/?p=220#comment-45220 This is some great information, and I appreciate your point that your pool water shouldn’t smell bad. I opened my pool for this season a week ago, and when I went outside this morning, the water smelled really weird. I’ll definitely look into having the water tested to see what the problem is before I let anyone swim in it. Thanks for the great post!

]]> http://hardsoftwater.com/swimming-pool-water-problems-and-testing/#comment-43601 Fri, 15 Jan 2016 20:04:35 +0000 http://hardsoftwater.com/?p=220#comment-43601 You should be very careful when measuring free chlorine in anything that has been used to test total chlorine. Even rinsing out several times does not eliminate the risk.
Potassium iodide, present in DPD No.3 tablets and HR Chlorine tablets need to be present in only a few molecules to cause interference so the result you get is closer to total chlorine. This is because it acts as a catalyst in the reaction of chloramines with DPD, and does not have to present in the level required to release iodide concentration.n the quantity related to the total chlorine.
It is best to keep one cell/test block etc for FREE CHLORINE only.

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