Balancing Help

[mknauss]

You should not lose more than 4 ppm FC or so during the day. Maybe a bit more if the FC is well above target range for your CYA. But 17.5 ppm? That is a bit excessive.

I would suggest you do the OCLT again. Be sure to brush the pool, etc after you have added the chlorine for the night. Then test 30 minutes later.

 

[Jbthompson]

You should not lose more than 4 ppm FC or so during the day. Maybe a bit more if the FC is well above target range for your CYA. But 17.5 ppm? That is a bit excessive.

I would suggest you do the OCLT again. Be sure to brush the pool, etc after you have added the chlorine for the night. Then test 30 minutes later.

Ok. I will bring it back up to shock level and try again.

 

[Jbthompson]

Ok last night, I lost 3 PPM. Still need to keep slamming. This is now 7 days. Here is what I have thus far.
7:15am: 17ppm
Add bleach per pool math
8:30am: 15 ppm
Add gallon of bleach
1145am: 12.5 PPM
Added bleach per pool math
3:30pm: 3.5ppm

This afternoon seems like a significant drop. Is something going on here? I am adding 4 gallons of bleach to bring back up to shock.

 

[mknauss]

How confident are you on your CYA level?

 

[Jbthompson]

How confident are you on your CYA level?

Very confident. I did it 4 times this morning. I think it's between 40 and 50, so I have factored it at 45 in pool math. I could up it to 50 I guess to increase the amount of chlorine needed

 

[mknauss]

50 is what we recommend when testing between whole numbers.
Really fast FC drop.

 

[Jbthompson]

50 is what we recommend when testing between whole numbers.
Really fast FC drop.

Yeah I will up it to 50 I guess.

 

[Jbthompson]

And very store within 20 miles of me is out of bleach. Ugh.

 

[Jbthompson]

Managed to find a Leslie’s that sells liquid chlorine at 12.5%. Much more expensive but needed it. The SLAM is back on.
I also decided to shut off my ozone generator to see if that helps. There isn’t a switch on it so I just pulled a fuse out.

 

[mknauss]

I also decided to shut off my ozone generator to see if that helps.

Good idea. It consumes some of the chlorine.

 

[Jbthompson]

The Leslie’s bleach didn’t have any numbering on it and it doesn’t smell as strong as the 10% I’ve been using so I’m skeptical.
Interestingly I turned off the filter for a few minutes to clean to baskets and crawly, turned it back on and green dust came out. Yikes. It has been running non stop for probably ten days. Will clean the filter tomorrow.

 

[Jbthompson]

Ok. Would you please take a look at these logs for me? My overnight is fine but my day time FC loss is crazy. My pool has eaten 25 gallons of bleach in two days.
Filters are cleaned and I am brushing the pool every two to three hours. Water is perfectly clear.

PoolMath Logs

 

[mknauss]

It acts like your CYA is lower than you are testing.

If you are passing the OCLT, let the FC drop to target range and see if you can manage it there.

 

[Jbthompson]

It acts like your CYA is lower than you are testing.

If you are passing the OCLT, let the FC drop to target range and see if you can manage it there.

thank you. It passed OCLT last night for a second night in a row. Will see how today goes

 

[Jbthompson]

Ok. Started the day from my OCLT at 19PPM. I came home at 5pm and measured 0 chlorine in the pool. I am so frustrated.

 

[Jbthompson]

I am now wondering if my cya is too low. I tested it (about 6 tummies tonight) and I can see the dot up to the very top. Maybe I need more stabilizer??

 

[mknauss]

That is the issue. I believe it has been asked multiple times about the CYA level.

If the dot is at least clouded, add 20 ppm CYA using the sock method. If the clear, add 30 ppm worth.

 

[Jbthompson]

Dang CYA test. So hard to read. I’m really scared to add too much. The water looks cloudy but I can see the dot, sun to my back. I added 7 lbs before I started this. Maybe an additional 4 lbs of dry stabilizer?

 

[mknauss]

At least 4 lbs, that is 18 ppm of CYA in your pool volume.

 

[Jbthompson]

Ok. Deep breaths. We can do this.