Clarification on Ozone vs. UV---High daily FC loss

[Krysib]

And for those wondering- for a 6 night SLAM on a clear pool where the only symptom was large loss of FC per day we used exactly 30 gallons of 10% chlorine at a cost of $165, and $55 worth of testing reagents (half of that is because I didn’t have enough prior to starting and ran out midway-pool store prices).

Grand total $221 and 187ppm FC added to the pool.

 

[thomasandanita]

And for those wondering- for a 6 night SLAM on a clear pool where the only symptom was large loss of FC per day we used exactly 30 gallons of 10% chlorine at a cost of $165, and $55 worth of testing reagents (half of that is because I didn’t have enough prior to starting and ran out midway-pool store prices).

Grand total $221 and 187ppm FC added to the pool.
View attachment 161031

Great job, and great looking pool.
And just so you know, Home Depot also has our bleach.
3 to a case for about 9 bucks

 

[Krysib]

Great job, and great looking pool.
And just so you know, Home Depot also has our bleach.
3 to a case for about 9 bucks

thanks!!

have you had good luck with the dates being fresh and not degraded due to outside storage?

 

[Dirk]

anything I’m missing?

Yah, the green!! Good plan to go an extra day. Nice work.

 

[thomasandanita]

thanks!!

have you had good luck with the dates being fresh and not degraded due to outside storage?

Yes, I have had great results so far. I have swcg but have had some technical issues lately and this was doing well. Our local store moves through the inventory pretty quick

 

[Krysib]

So....

passed the OCLT Thursday and Friday night. Was going to test again this morning but woke up to a DRAINED spa!!!

somehow last night after using the spa the automatic actuator for the pool returns switched over but the drain stayed in spa mode.

so-refilled the spa, reset the actuators and working on getting FC stabilized again with the extra fresh water. Also had planned a party today so dosing up in anticipation of the extra bather load.

wish me luck!!

As an aside-ordered a phosphate test from Taylor-didn’t get a reading above 250ppb——so another example of why we don’t trust the pool store!!!!

 

[Krysib]

Hi all-

I did a SLAM last week after noticing high daily FC lose on my new pool.

passed the OCLT two nights in a row on Thursday and Friday. Let FC float down over the long weekend and have been maintaining and checking levels multi times a day to ensure it doesn’t go below min for my cya.

So if I passed the OCLT-why do I still have to add a gallon of 10% bleach daily to my pool? That would adds over 6ppm FC daily.

should I increase my cya to 70? Or will I still lose 6ppm FC daily?

As an aside-it was rainy and cloudy today

 

[mknauss]

Two things consume chlorine, UV and organics.

 

[Krysib]

Thanks Marty-I wasn’t sure if it should be a new thread or not.

So....I would assume I need to go back to slam and that my two OCLT were inaccurate due to testing error?