Slamming this am, have questions

[Jean-ji]

Slamming today. The calculator is telling me 224 oz bleach for a 7500 gallon pool with CYA of 70 and current FC of 3.5 to get the FC to 28 for salt pool. Is this correct? I want other eyes before I do this.

other questions

Do I poor this much bleach around the entire perimeter of the pool?

Do I stop adding chlorine after sunset to do the OCLT in the morning?

Is there a better time of day to begin this?

 

[mknauss]

If you are using 10% liquid chlorine I get about the same - 235 oz.

Pour the bleach very slowly at the return stream coming into the pool. NO need to walk around and chance splashing bleach every where.

At your last test and dose for the evening, after sun down, wait 30 minutes after you add and test FC again. Record that. Compare that to your FC test in the AM.

Nope, time is of the essence. Start now.

 

[Jean-ji]

Thanks, I’m on it!

 

[Jean-ji]

I’m so glad I started this, thanks mknauss for putting a fire under me. I was nervous with adding what I consider a lot of bleach for the first time in a new pool. The water looked clear and nice and I had my doubts if it really needed a SLAM, but the OCLT was telling me different with the FC loss.

It’s been five hours since the initial dump and two additional dumps to keep the FC at 28. The water is already sparkling clear, I now know the difference between clear and sparkling clear. I’ll check again at 5 and at 7 with the last addition for the night and then another OCLT. I’m getting more bleach in case I need it for another go if the FC loss is more than 1 ppm tomorrow morning.

I’m making a game plan for the pool and testing to never do this again, but at least I’m not afraid of doing a SLAM now.

 

[Richard320]

Excellent news!

Yes, there really is a special sparkle to a TFP pool. And now that you've seen it, there's no going back. You're going to become a pool snob.

 

[Jean-ji]

It it good news. We just had a torrential downpour though, so my FC was lower than the one before, and I added more bleach to bring it back to 28 FC again. I’ll take the last one for tonight and then see what the morning one will be. I hope it doesn’t get too diluted, the worst of the storms have passed by I think.

I’m assuming the rain diluted my FC and some went in the outflow. Darn!

 

[mknauss]

Unless it rained a couple feet of water, not much effect.

I always say, the pool could care less it is raining, it is all ready wet.

 

[Jean-ji]

OCLT
Last evening: 28 FC
this morning. 20 FC
0.0 CC

Water was sparkly yesterday and is today, no CC but chlorine loss, so all three criteria not met.

Yesterday, the chlorine was going down to 21.5 to 22.5 after bleach each time. We had hot sun and a torrential rain and more rain but not as intense after the last test for the night.

We brushed and vacuumed yesterday, washed out the cartridge this morning and added bleach to bring it up to 28 again and will continue with the SLAM.

Does this sound normal?

 

[Mike1162]

Sounds to me like you're doing a good job. Brush and vacuum again today.

 

[Jean-ji]

The PH is around 8.2, can I add MA during a SLAM?

 

[SpringPool]

At high FC levels the ph test is not accurate. Wait until the slam is over and FC is back to normal levels before testing again.

Just remember PoP (Pool owner patience). It sounds like your close with the 2 of the 3 criteria met. Hopefully tonight you’ll pass the OCLT

 

[Jean-ji]

This PoP stuff is becoming difficult!

There was still a 2.5 FC difference on the OCLT this morning. I ran it twice, hoping I made a mistake. The filter was minimal when we cleaned it yesterday morning, nothing has been seen when brushing or vacuuming from the start. The 0.5 CC we started with went to zero after the first dump of bleach and the water was sparkly before the first day was done.

I am so tempted to stop, but I won’t.

 

[Derb22]

Don’t stop. Something still in the water eating Chlorine at night. Almost there, don’t give up.

 

[SpringPool]

Just think. Once you get there it becomes easy to take care of the pool and you’ll have a sparkling pool to use the rest of the season.

 

[Jean-ji]

I was thinking about all of this and realized I had not taken the screw cap off of the umbrella inset on the sun shelf for an umbrella. I keep the cap on when the umbrella isn’t in there. I unscrewed it and cleaned it out, leaving it off. The water in there was untreated and sealed in. I don’t know if it’s important or not, but it makes sense to clean it.

I have been turning on the descent to run SLAM water through it daily for a half hour.

 

[Derb22]

Anyplace algae can hide. Ladders? Lights? Great catch on the umbrella stand.

 

[Jean-ji]

No ladder, there is one light.

I’m encouraged though, the 1:30 p.m. FC is 26.5, the best daytime reading I’ve had so far, it’s usually been 20 or 22. My SLAM level is 28.

Typical FL weather today: hot sun this morning, a torrential rainfall, and back to full sun. There were drops of rainwater falling off the pool cage cross bars, making concentric circles on the water with shadows clearly seen on the floor of the deep end (5.5 ft) of the pool. It looks great, now to get the numbers to prove it.

 

[SpringPool]

Looking at the picture I can make out the screw head in the drain. Pass oclt tonight and I think you’re there.

 

[Mike1162]

Is that green in the drain cover or just shadows?

 

[Jean-ji]

Just shadows, it’s a gray drain. I’ve not had any green in the pool, just FC loss and the water looked dull.