SLAM my pool for the first time

So, you test FC and got say a 5. You added 11 ounces and your FC test 30 minutes later was 16?

What was your before and after FC test results? How much did you add?

(FC 30 minutes after addition) - (FC before addition) = X

put into Pool Math
Liquid Chlorine
% concentration
amount added

Adjust pool size until this 1721856748163.png
says Raise Free Chlorine by X ppm
 
You have organic working against you consuming FC. You will need to do this test when you don't have algae to fine tune your volume. I think your estimate is of 7500 is about right. Is your water 3.5’ deep?

A 12x24' pool with 3' of water is about 6500, 3.5' is 7500 and 4' would be 8600.

IMG_0922.png
 
You have organic working against you consuming FC. You will need to do this test when you don't have algae to fine tune your volume. I think your estimate is of 7500 is about right. Is your water 3.5’ deep?

A 12x24' pool with 3' of water is about 6500, 3.5' is 7500 and 4' would be 8600.

View attachment 599233
Not really sure how can I check?
 

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As the title mentions still no changes to my pool on day 5.

Its consuming less chlorine, .5-2 ppm every 2 hours. Overnight I only lost 2 ppm but after 5 days and 5 galloons of chlorine and still as green as day one it just seems off.

Can my cya be off? I tested about 3 days ago but during the test I really never see the black dot fade away. I just fill up the tube of foggy water before it can disappear. At this point I only have 1 more shot to test cya before I run out of testing liquid. Going to order more but in general I feel like no visual changes means the algae is still well and alive and unfazed by my effort. Losing my patience.

Seriously,

First time slamming my pool.
 

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"0319", I just reviewed your entire thread to catch up. You have a lot of good notes and advice provided, but I want to point out some things that caught my eye.
1. Even though you filled from a local (city) water source, and the pool store test "appears" to show low iron content, it doesn't mean you don't have an iron problem. I don't want to get too distracted by that comment just yet, just be aware it may be an issue later. Priority right now - being 100% you have eliminated any potential algae first. That brings me to my next point.
2. There were some recent posts where your FC loss was very minimal. I was about to say you passed an OCLT as well. But in your last post (#59) you said you lost 2 ppm of FC overnight, so that's a fail. That confirms you still have a heavy organic load in the water and should continue the SLAM Process.
3. A SLAM can easily take a week or two. Much depends on the water condition, testing, and diligence to maintain the proper FC level. You just started this adventure about 5 days ago, so I would try to remain patient and let the chlorine do its job. If you are out of the area this weekend, just start back up when you return.
4. Using 5 gallons in 5 days is not bad. We have owners who go through 5 gallons in one day. Albeit your pool isn't as large as some, but you're doing quite well.
5. Your CYA must be accurate. At one point it appears it was below 30 so you added some stabilizer. Just be sure you have a good solid CYA of 30 and no less. Anything less than 30 and the summer sun will take the chlorine too fast during the day.
6. Have you added anything else to the water since you filled it a couple months ago? I noted that one pic of your filter cart, and it almost looked turquoise in color which would point to copper. Iron in the filter would look more orange, and algae green. If that was indeed more of a green color and it washed away fairly well, please confirm. If it is turquoise and doesn't come off at all, we need to know that as well.
7. Are you seeing any staining around the liner?
8. Can you see clearly to the bottom through that shiny green water? Or is it still murky?

For now, maintain the SLAM. Be patient, but know lots of folks are trying to coach you through this in hopes you will get another month or two of good pool time before closing. We're watching.
 

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