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Soft Water Fill On Salt Water Pools
by Jed
(Santa Ana, CA)
In an effort to keep the calcium hardness levels down in pools where we have filled the pool initially with 16 grain water, could I use a water softener for the make-up water? That way the hardness levels would stay at the same level and not climb and cause all the scaling problems. Thanks for the question Jed
In answer is yes you can use a water softener to help lower the hardness level, but it may take some time and alot of salt.
You need to measure the flow rate of the line going from the water softener to the pool. Use a 5 gallon bucket and time how long to fill it up. Convert that to gallons/minute.
Then you should know the hardness of pool water and the soft water capacity of the water softener. It's easiest to calculate if both are in "grains".
I believe it's this:
PPM = 17.1 X Grains. So if your water test shows 600ppm of hardness, that equals 600/17.1 = 35.1 Grains/Gallon.
So if your softener has a capacity of 35,000 grains, it means it can remove the hardness from about 1,000 gallons of pool water.
You then take the flow rate of your water softening system and calculate how many hours it will take to run 1,000 gallons to the pool.
For a normal flow rate of 5 gallons per minute, that would be 300 gallons/hour. It would take a little over 3 1/3 hours to soften 1,000 gallons to zero. You probably won't get to zero, but probably pretty close.
I don't know if you needed all of that to answer your question, but I wanted to give you more than you asked for so you could have a timeline to do your pool water softening.
To post a reply, or if you have a similar question, you can see your post on the Q&A page in the "Salt Water Pools" category.
Swimming Pool Questions and Answers
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Hope this helps and have a great Summer.
Robert
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