Calcium Hardness Problems

carlos31820

LifeTime Supporter
Nov 22, 2010
406
Midland, Georgia
There’s no way your test is accurate. That’s over 350 lbs of calcium chloride in a 20k gallon pool.

According to pool math calculator, adding that much calcium chloride to a 20k gallon pool should raise your calcium hardness by 1909!!
 

Tjandjess

Member
Jun 4, 2019
19
Louisburg NC
Where are those tests from?

How much calcium have you added? In what form?
Something doesn’t compute. Adding 5,564 oz of calcium chloride in 20,000 gallons will raise your CH by 1909 ppm.

You have added 353 lbs of calcium chloride?

What product?
I have mostly used Puri Tech Pool Chemicals Calcium Hardness Increaser Plus but also some of the clorox brand from Walmart.
 

Richard320

TFP Expert
LifeTime Supporter
Jan 6, 2010
23,866
San Dimas, CA (LA County)
I have mostly used Puri Tech Pool Chemicals Calcium Hardness Increaser Plus but also some of the clorox brand from Walmart.
The question is really whether it was 5,654 ounces (350 pounds) of stuff or if there's a typo.

It pretty much goes without saying that your tester is wrong. You can't add significant amounts of anything and just not have it show up at all.
 

Dirk

Gold Supporter
TFP Guide
Nov 12, 2017
5,030
Central California
A "poster child" thread for the TF-100 test kit if ever there was one. I don't know anything about the colorQ other than it's not one of the two TFP-recommended tests kits. Taylor: K-2006 being the other one.

You can buy just the Taylor CH test kit if you're not convinced you should switch over.
 

Dirk

Gold Supporter
TFP Guide
Nov 12, 2017
5,030
Central California
Coincidentally, the next thread I read was this one. You might take a look see, especially post #9, from one of our most respected experts (but please don't tell him I said so! ;) ).

 

YippeeSkippy

Mod Squad
LifeTime Supporter
Jan 17, 2012
13,788
Evans, Georgia
The ColorQ has a known problem with calcium tests, but *if* we can believe those other tests you're woefully short on chlorine in the pool also. I'd hate to have you develop algae while struggling with that calcium problem too.
See this--> FC/CYA Chart <-- excellent resource to help you keep the FC balanced against the CYA

Maddie