Algae Help!

[poolmom21]

Your volume pool one gallon of 10% liquid chlorine will add 4 ppm FC. To raise your FC to SLAM level (20 ppm FC) you need 5 gallons. Then you will be adding at least a gallon, maybe two, every few hours to start.
I would suggest getting at least 15 gallons. If the store is not far from you, get 10 gallons but be prepared to go back to the store every couple days until the algae is defeated.

Oh WOW. Also, do I keep my SWG during SLAM if so, what %

 

[mknauss]

Oh WOW. Also, do I keep my SWG during SLAM if so, what %

In general we say to turn it off, at least at the start. It is not designed to add the amount of chlorine you need to combat the algae. Once you are in the maintain/filter part of the SLAM Process, you can turn the SWCG on to help out on maintaining the FC levels.

 

[poolmom21]

In general we say to turn it off, at least at the start. It is not designed to add the amount of chlorine you need to combat the algae. Once you are in the maintain/filter part of the SLAM Process, you can turn the SWCG on to help out on maintaining the FC levels.

In general we say to turn it off, at least at the start. It is not designed to add the amount of chlorine you need to combat the algae. Once you are in the maintain/filter part of the SLAM Process, you can turn the SWCG on to help out on maintaining the FC levels.

Oh WOW. Also, do I keep my SWG during SLAM if so, what %

The Pool app advices to add 2.4 gallonsto get FC to 20. Your advising 5 is that correct? Also how often should I be checking the FC in the pool once I start SLAM?

 

[Oly]

If you are using 12.5% liquid then add the 2.4 gallons and test after 30 minutes with the pump running. Verify if you are at 20ppm, your target. If you are low add more and use pool Math for dosage estimates. If you are at 20ppm or slightly above fantastic, test often and keep it at 20 for best results.

 

[poolmom21]

If you are using 12.5% liquid then add the 2.4 gallons and test after 30 minutes with the pump running. Verify if you are at 20ppm, your target. If you are low add more and use pool Math for dosage estimates. If you are at 20ppm or slightly above fantastic, test often and keep it at 20 for best results.

So is the pool math calculator wrong?

 

[HermanTX]

you have a starting FC of 12 in your calculator whereas some of the other recommendations were giving you an increase from zero FC. If you are using 12.5% then every gallon will raise FC by 5ppm.

 

[HermanTX]

Also as stated by others. Once you add Liquid Chlorine ((LC) and reach 20 ppm you need to test every 3-4 hrs during the day to ensure you stay at that level. That is why you need to have sufficient supply of LC on hand.

 

[wireform]

But the first time you bring the FC up to slam level you have to confirm that 15 minutes later by testing as it may have not reached slam level because it starts to get consumed if there algae. Keep adding till your test outcome shows the FC level you want, after that every 2-3 hours top it off according to the app. Some don't check it as I described and never attain slam level.

 

[Oly]

So is the pool math calculator wrong?

Nope, I used your last FC 18 hours ago now which was 10.5.
Enter your most recent FC ppm and the % liquid you are using, target 20ppm FC and be sure your pool volume is correct. Be sure to verify your FCppm after fully mixed, don't rely on calculated estimates.

 

[poolmom21]

I did an overnight chlorine test and lost about 1.5 of FC. However, I have 0 CC.

 

[mknauss]

Follow the SLAM Process. Once you pass all three criteria described in the article, return to maintenance mode.

 

[Newdude]

I did an overnight chlorine test and lost about 1.5 of FC.

That’s getting close so you will be at the finish line soon. However. Don’t get discouraged if you get a OCLT with more loss for a day or 3. SLAMs can do the 2 step forward / 1 step back thing, and it doesn’t mean anything bad, it just means you stirred up more stuff that needed killing……. And killed it. So the perceived bad thing is still a good thing.

 

[poolmom21]

Yes, I will go and get more LC today and turn off SWG Clorinator during process. And I let the filter run the 24 hours correct. I’m going to get the CYA tested at pool store to know what to go off by since I can’t do the cya at home. But I am mentally prepared no to buy any other liquids then bleach and acid.

 

[Newdude]

. And I let the filter run the 24 hours correct.

Semantics !!!! The filter cannot run. The pump runs and pushes water through the filter to filter it. You are no longer an Amateur. You go in the pool store talking like that and you might as well write them a few mortgage payments.

*And yes. Ahem. Run the pump 24/7 throughout the SLAM.

 

[poolmom21]

Semantics !!!! The filter cannot run. The pump runs and pushes water through the filter to filter it. You are no longer an Amateur. You go in the pool store talking like that and you might as well write them a few mortgage payments.

*And yes. Ahem. Run the pump 24/7 throughout the SLAM.

Ha ha yes that is what I meant the pump. Waking up at 5 am and going back to bed and no coffee has me not thinking straight lol

 

[poolmom21]

So the CYA reading is 65 according to Accublue test. And I found 8 gallons of LC at 12.5%. So tomorrow I will be doing SLAM.

 

[HermanTX]

So the CYA reading is 65 according to Accublue test. And I found 8 gallons of LC at 12.5%. So tomorrow I will be doing SLAM.

Have you heard back from TFTestKits regarding your new CYA tube? It is really important to be able to verify your CYA.
Did you try the tape on the cracked tube? Did that help?

The reason being is that if your CYA is higher i.e. 70 (we normally round up) then that means you need to target a higher FC level for the SLAM. CYA of 60 is 24ppm and CYA of 70 is 28ppm. This means more chlorine - that is why it is very important to have accurate test so your SLAM can be effective.

The data given earlier - 1 gallon of 12.5% liquid chlorine will raise your FC by 5ppm is still valid as that is based on your pool volume - i.e. 25,000 gals. So when you start your SLAM - measure your FC before you start so you know how much LC to add to get to the desired SLAM level FC.

 

[poolmom21]

Have you heard back from TFTestKits regarding your new CYA tube? It is really important to be able to verify your CYA.
Did you try the tape on the cracked tube? Did that help?

The reason being is that if your CYA is higher i.e. 70 (we normally round up) then that means you need to target a higher FC level for the SLAM. CYA of 60 is 24ppm and CYA of 70 is 28ppm. This means more chlorine - that is why it is very important to have accurate test so your SLAM can be effective.

The data given earlier - 1 gallon of 12.5% liquid chlorine will raise your FC by 5ppm is still valid as that is based on your pool volume - i.e. 25,000 gals. So when you start your SLAM - measure your FC before you start so you know how much LC to add to get to the desired SLAM level FC.

No, i haven’t heard back and I even left a voice mail. I can’t tape the tube. It’s cracked on the bottom where tape can’t help.

should I go off the 24 FC slam amount since I am in between?

 

[PoolStored]

I would use the CYA 70, and 28 FC for your slam until you get a new tube.

 

[HermanTX]

For the SLAM I would start by targeting 28ppm because it is not a direct linear scale from 60 to 70 so lets go with 70 CYA.

Also, what about some glue on the bottom because it really doesn't affect the reading of the CYA tube. Just need to hold the solution.

Suggest you DM @Leebo to help on the exchange needed.