Help! High CYA/Switching to this from pool store testing and chemocals

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
32,623
Laughlin, NV
OK -- remind me -- you need to SLAM? If so, lowering the pH is fine. Sorry.

That is the correct amount of acid. You can just guesstimate a quart out of the jug. Pour slowly at the return stream into the pool. Under estimate a little. No issue.
 

Ilovemylife1129

Well-known member
Aug 7, 2018
63
Canonsburg/PA
OK -- remind me -- you need to SLAM? If so, lowering the pH is fine. Sorry.

That is the correct amount of acid. You can just guesstimate a quart out of the jug. Pour slowly at the return stream into the pool. Under estimate a little. No issue.
Got it! Thank you! And what would be your suggested bleach to water ratio to soak the bags in?
 

Ilovemylife1129

Well-known member
Aug 7, 2018
63
Canonsburg/PA
I have another question🤣
For the OCLT, after I test like I just did this evening at 11:30, do I add the recommended amount of chlorine or add nothing. Like, just test to have something to go off of in the morning to determine if it dropped more then 1ppm. Because that’s what I have been doing(not adding anything after my last evening test even if I’m not at my SLAM level of 16). Or should I be adding the quart it said to add tonight and then still goin off my number before I added the quart tonight to compare to the number in the morning? I hope that makes sense? So to add or not to add any chlorine after my night test for my OCLT?
 

mgtfp

Bronze Supporter
Mar 5, 2020
409
Melbourne, Australia
Since you are still during your SLAM, you should ideally be above SLAM level over night.

So, ideally you add enough bleach once it's dark to bring your FC above SLAM level, and after 30 mins of circulation you make your pre-OCLT FC-test.

You can't add any chlorine after that test.

In the morning before sunrise, you do your post-OCLT FC-test. Then you can add bleach again should you still be failing one of the criteria to end the SLAM.
 
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heikejohn

Well-known member
Oct 18, 2007
291
Cedar Hill, TN
So we pulled our steps out today and I think it is the sandbags we put in our steps to hold them down. We put sandbags inside of another bag that holds them. We are going to get new sandbags. Do you think we can clean the bags that hold the sandbags?
We don't use sandbags due to this exact reason.
What we did is: Cut PVC pipe to the length required to sit inside bottom steps, glue a cap one side, fill with concrete (or gravel), glue 2nd cap on the other side. We have 3 of those tubes, reuse them every year, and have not trouble with algae under the steps any more.
 
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Ilovemylife1129

Well-known member
Aug 7, 2018
63
Canonsburg/PA
Since you are still during your SLAM, you should ideally be above SLAM level over night.

So, ideally you add enough bleach once it's dark to bring your FC above SLAM level, and after 30 mins of circulation you make your pre-OCLT FC-test.

You can't add any chlorine after that test.

In the morning before sunrise, you do your post-OCLT FC-test. Then you can add bleach again should you still be failing one of the criteria to end the SLAM.
Perfect, thank you!
 

Ilovemylife1129

Well-known member
Aug 7, 2018
63
Canonsburg/PA
We don't use sandbags due to this exact reason.
What we did is: Cut PVC pipe to the length required to sit inside bottom steps, glue a cap one side, fill with concrete (or gravel), glue 2nd cap on the other side. We have 3 of those tubes, reuse them every year, and have not trouble with algae under the steps any more.
Is it difficult to get the pipes out every year to remove the steps?
 

Ilovemylife1129

Well-known member
Aug 7, 2018
63
Canonsburg/PA
Ok so today is my 7th day of SLAM. Pool has been crystal clear since start as we had drained and refilled 60%. CC has been 0 for two days now. I just can’t get my FC level to drop less then the 1ppm overnight. It drops about 3ppm for the last 3 nights. Any suggestions? Just keep at it?
 

heikejohn

Well-known member
Oct 18, 2007
291
Cedar Hill, TN
Is it difficult to get the pipes out every year to remove the steps?
No. We pull the ladder up half way, dive down and take them out one at a time. Same as if you would take out the sand bags. Our sandbags always developed some small hole & algae would start inside. With the pipes, they are completely sealed. No chance of algae ever!!! We have been using the same ones for 5 years now.
 

Ilovemylife1129

Well-known member
Aug 7, 2018
63
Canonsburg/PA
Something is still consuming your chlorine. 3ppm over night is too much, looks like you have to keep going. Make sure you really stay above slam level all the time.
I didn’t realize I needed to stay above SLAM level. Pool Math tells me what to add to keep reaching FC 16 as my CC 0 and my CYA is 40. Should I try to be higher then 16?
 

Ilovemylife1129

Well-known member
Aug 7, 2018
63
Canonsburg/PA
We do t have a light, we pulled our stairs and haven’t put them back in yet, I’ve checked and brushed the skimmer box, I don’t see anything on any toys. My kids have jumped in for about an hour each day when ever we have dropped at one testing before I add more chlorine. But that was said it’s ok.
My vaccuum cord is getting tangled and I’m waiting on a new one, so I have to get in to make sure it vaccuums everywhere.