Poolside Chat Episode 35: Lowering Swimming Pool Salt Levels

Poolside Chat Episode #35: Lowering Swimming Pool Salt Levels

This is Poolside Chat where every week we answer your questions on how to fix and maintain your swimming pool. Poolside Chat is presented by INYOPools.com, helping pool owners find the right parts since 2001. In today’s episode of Poolside Chat, Rob and Matt tackle another common swimming pool question:
  • How many gallons do I drain from my pool to correct its salt level?

Now here’s your hosts – Matt and Rob.

“How much water needs to be replaced in order to lower the salt reading to an ideal level?”

You may be wondering why a high salt level is bad for the salt chlorinator. The reason being, is if the salinity level is too high, the chlorinator will stop making chlorine and that’s no bueno.

We have a simple math solution that’ll tell you how much water you need to drop from the pool.

Let’s say your current salt level is 4500 parts per million and your ideal level is 3200 parts per million. You’ll subtract the 3200 from the 4500 which gives you 1300 parts per million. That’s what you need to drop. You divide 1300 by 4500 and that gives you .28888888. For this, we’ll just round it up to an even 29%.  You need to drop roughly 29% of pool water.

But if you’re trying to figure out how many gallons are in your pool–let’s say our pool is 10,000 gallons you’re going to multiply that by 29% which is .29 and then that equals 2900 gallon. Now, you’re going to take that water out which is about 1/3 of your pool and then you’re going to add fresh water and then everything should balance out at the end of it.

But if you have any questions about salts or water or water chemistry in general, give us a call over at 8773726038 or visit us at inyopools.com.

5 thoughts on “Poolside Chat Episode #35: Lowering Swimming Pool Salt Levels

  1. What’s Happening i am new to this, I stumbled upon this
    I have discovered It positively helpful and it has aided me out loads.
    I hope to contribute & help other customers like its helped me.
    Good job.328266

  2. I have been using a chlorine generator for the past few years, and now I have to replace the top rail of my pool due to corrosion caused by the salt, so I am going to go back to an in-line chlorinator. I have been trying to find out how much water I should drain from my pool to get the salt level down to a non-corrosive level, but I can’t find anything on it. My local pool store says it is the process of breaking down the salt that caused the corrosion, and I can leave the salt in the pool without any problems, but I’m not sure if I believe that. Can you offer any insight? Thanks, in advance, for you assistance.

  3. Although my salt water inground pool is crystal clear if my ph levels go a little low how do I correct that? I just had pool put in in August I live in Alabama

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