Which rock salt (Calcium Product) do you use?

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rp7777

Well-known member
Oct 10, 2011
128
Plantation Fl
I have low calcium sitting at about 125 and I need it to go up to about 250. I had added what appears to be the correct amount of calcium per the Pool math calculator on 2 separate occasions over the past couple of weeks but the 125 range remains the same. Which brand on Amazon do any of you use? I want to make sure I buy the correct one and since I live in Florida we do not get too much snow requiring rock salt so I pretty much have to order online.

I used up that last of my calcium bag so it’s time to get more.
 
Rock salt is generally mostly SODIUM chloride and either has no, or very little, calcium chloride in it. You need to buy a product that has mostly calcium chloride. You can either buy the more expensive pool store CH Increaser which will be pure calcium chloride OR you can try to find Ice Melt products. Be warned though that ice melt products typically are a mixture of calcium, magnesium and sodium chloride as well as sand and it’s often hard to figure out the composition.
 
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rp7777 said:
I have low calcium sitting at about 125 and I need it to go up to about 250. I had added what appears to be the correct amount of calcium per the Pool math calculator on 2 separate occasions over the past couple of weeks but the 125 range remains the same. Which brand on Amazon do any of you use? I want to make sure I buy the correct one and since I live in Florida we do not get too much snow requiring rock salt so I pretty much have to order online.

I used up that last of my calcium bag so it’s time to get more.
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Any pool store will have calcium, don’t need to order it online and pay huge shipping costs. Would also be good to double check how you’re measuring the calcium. What’s the number exactly? The test kit don’t give a range so just wanting to make sure you’re not using test strips.
 
We've used this one from Amazon successfully in the past. Pricey then, and now it's worse. We only need to top of once a year or so, so figured it's worth the peace of mind. There are horror stories of people using random brands that stained their plaster or ruined the water.

Since the one above was used up, I've tried this from Home Depot because there were comments of others saying it worked in their pools. Maybe risky, but the company rep also commented saying it's pure CC. I've used about 15 pounds so far. No issues. Raised CH as predicted by PoolMath.
 
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generessler said:
We've used this one from Amazon successfully in the past. Pricey then, and now it's worse. We only need to top of once a year or so, so figured it's worth the peace of mind. There are horror stories of people using random brands that stained their plaster or ruined the water.

Since the one above was used up, I've tried this from Home Depot because there were comments of others saying it worked in their pools. Maybe risky, but the company rep also commented saying it's pure CC. I've used about 15 pounds so far. No issues. Raised CH as predicted by PoolMath.
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That is a big range of calcium chloride percentage for that product. Based on your experience, what do you think the percentage is? i.e. If you are expecting X amount of ppm rise with X amount of pounds, can you calculate it? Thanks.
 

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Bperry said:
Any pool store will have calcium, don’t need to order it online and pay huge shipping costs. Would also be good to double check how you’re measuring the calcium. What’s the number exactly? The test kit don’t give a range so just wanting to make sure you’re not using test strips.
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I use the tfp test kits with the drops. No test strips
 
Randrx2 said:
That is a big range of calcium chloride percentage for that product. Based on your experience, what do you think the percentage is? i.e. If you are expecting X amount of ppm rise with X amount of pounds, can you calculate it? Thanks.
Click to expand...
On the Home Depot page, someone asked what the per cent of CaCl is. The Bare Ground company rep answered 100%. As said in the original post, the CH rise when added agreed with PoolMath prediction for 100%. That safety page says exact percentage is a trade secret. Apparently the company rep didn't know that :)

I'm not recommending this stuff. Just saying my experience.
 
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