New Pool Owners with Chlorine Troubles!

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Okay full round of test this morning.
FC = .5
CC = 1
pH = 6.8 (Getting there!!)
TA = 120
CYA = 80 (cloudy out so not sure how accurate)
Hardness = 225 (way different then last nights reading)

Added 1 more box of Borax at 10 AM.
 
Well, we have confirmed high CYA. The pool store did you no favors suggesting all that powered shock.

Here is the choice you have at this point, shock at high CYA which will take more chlorine or do a partialdrain and refill which will lower the CYA and use less bleach to SLAM.

If you are going to go the drain route, do it first before you add any more bleach or borax.

Now, if you are going to SLAM with high CYA continue on your current path.
 
No, it won't cause problems all season, once it clear. The problem is that at 80 you use twice as much bleach to SLAM as at 40. It's all about how much bleach/chlorine you will use now to clear it up.
 

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Here is what the pool looks like.
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Are you slamming the pool? Here is the process for that, Pool School - SLAM - Shock Level And Maintain

If not, then it is important to always keep chlorine above the minimum level for the
CYA level to keep the pool safely sanitized and stop algae from growing. Chlorine CYA Chart
CYA of 80 means never letting you FC drop below 6 and trying to keep it at 9 to 10 at all times.
 
If you are having trouble maintaining chlorine level you can raise the chlorine level to 10 ppm and Pool School - Perform the Overnight FC Loss Test (OCLT) to see if there organic matter or algae consuming chlorine. If you pass no SLAM, if not then SLAM.

Here are some of my fave Pool School articles on pool chemistry.
TFPC for Beginners
ABC's of Pool Water Chemistry

Here are the Recommended Levels for your pool.
Here are the Recommended Pool Chemicals and how to add them.
Use PoolMath to figure out how much to add.
 
Yes, with 80 CYA that is correct. That CC number means you are going to need to slam the pool. That 80 CYA is going to make it a oittle more difficult due to the shock level being quite a bit higher. Take a look at the chart and see the difference between 80 and 30 or 40 and decide if you want to live with 80 and higher chlorine levels or partial drain to lower CYA first. It is perfectly fine and safe to swim with high CYA and the proportionally high chlorine levels up to shock level. It just takes more chlorine to maintain your pool. On the bright side if you decide to convert to saltwater your CYA level is just right.
 

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