How will soft water impact my pool/SWG/equipment?

Aug 29, 2012
11
Gilbert, AZ
We live an area with hard water, and are exploring the possibility of retrofitting our house with a soft water loop. Since it wasn't added during construction, the entire house, including the pool refill valve, would have to be on soft water. I can keep one outside tap hard, so initial filling of the pool could still have hard water, but all of the evaporation/refill would be soft. We would use NaCL as a softener over KCl. Does anyone have first hand experience with soft water in a pool? I understand that I would need to maintain an acceptable level of calcium to prevent leaching from the pebbletec. I have also read that soft water will increase alkalinity and PH, and we already have frequent acid demand in the summer, so I am not sure what to expect there. With a SWG, would the softened water be likely to drive my salt saturation up quickly, thus rendering my chlorinator ineffective?(Obviously it would depend on specifics and calibration, but I am just seeking out any information/advice/experience to weigh the headache of it all). We do not want to drain/refill every year or hamper our equipment. Less calcium scaling sounds nice, but I do not have a problem with having hard water in our pool If we were to do it, the goal is to get soft water in the house, so we are trying to decide if soft water in the pool is a deal breaker. The system we have was not maintained well by previous owners, so we have already had a great deal of maintenance. The last thing we want to do is damage the pool or pool equipment. Any insight is appreciated!
 
Many people use soft water for topping off evaporation. It works very well, and when used in combination with small quantities of hard water you never need to add, or remove, calcium. The one issue, and this is rare, is that the salt level will be higher than it otherwise would be. As long as salt stays below 6000, and it probably will, you are fine. But you do want to monitor the salt level and in rare cases may need to lower it.
 
We are in Gilbert, AZ. City stats say water hardness runs from 4-24 or so here. I just did the calcium test on our tap water and was a bit surprised it isn't higher. I came up with a range of 180-200 (never quite sure if I should wait until it turns completely blue, or starts to change color). We do see scaling on the pool very quickly after refilling, and that is very common here.
 
All tests are done until the last drop causes no further color change and that drop does not count.

Please add your location (City, State or City, Country) to your profile and pool details to your signature as described HERE as it will help us help you.
 
I live in Portland, OR and the water here is naturally very soft. I have to add calcium when I open the pool as well as increase the PH and alkalinity since I have a mesh winter cover. I haven't had a problem with PH or alkalinity. I have a SWG and if I get my alkalinity at about 80 or 90 when I open the pool the PH is very stable and I haven't added acid in several years.
 

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