Chlorine not showing up in SWG.

[TomLane]

Hello

We just got the okay to add salt to our resurfaced pool and also added Chlorine. I added both the salt 640 pounds, and Chlorine 110 ounces of 10% bleach on Friday. Today, I tested and the salt is 2100 ( I already knew I would need more salt) but the chlorine is still not showing up. The pool pump has been running 24/7 since the salt was added and the SWG was turned on yesterday.

Not sure what I might be missing? Does the chlorine take a while to show up? I will be adding muriatic acid for the PH today but am not sure if I should add more chlorine.

TA is 120
CYA = 60
PH is 8.0
CH = 300

Thanks, Tom

 

[mas985]

The SWG won't produce CL if the salt level is too low. A warning should have shown on the display. I would continue to use liquid CL until you have the salt level correct.

 

[TomLane]

Added the additional salt yesterday afternoon and also added muriatic acid to lower the PH which was 8.0, and liquid bleach 10%. Still not showing any chlorine when testing today. Not sure how long until I should see the chlorine levels increase?

 

[mas985]

How much bleach did you add?

How old is your test kit?

At this point you may have something consuming all of the chlorine. I would bring it up to at least 10 ppm with liquid chlorine and then see if you lose anything overnight to warrant a SLAM.

 

[TomLane]

Added one gallon of 10% bleach, Test kit is new Taylor 2006, also had the pool shop check and they read no chlorine, Which try adding liquid chlorine again and check again.

 

[mas985]

Each gallon of bleach will add only 3.5 ppm to that size pool so I would add at least two gallons but if there is something growing, it will take a lot more than that.

 

[domct203]

How long after adding chlorine do wait to check FC? An hour later, 12 hours later, next day?

 

[mas985]

An hour should be sufficient, pump running of course.

 

[domct203]

I was asking the OP.....


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[TomLane]

I've been checking about 12 hours later. Today I checked an hour after adding 3 gallons of 10% and I have a lot of FC. I tried testing the exact amount but is was using too any drops. I will see how it does overnight.

Thanks, Tom

 

[mas985]

Sounds like it is SLAM time.

 

[TomLane]

Thats what I am thinking. Showing no FC 7 hours after I tested and showed plenty. Water still looks crystal clear.