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If stain comes off with vitamin C, likely iron. Two options: keep the iron constantly dissolved in the water by use of a sequestrant solution (Jack's magic) or replace the water in the pool with water without iron

If your pool is plaster, raise the hardness to 250. If fiberglass, 220. If vinyl or above ground, ignore. When pH hits 8.0, lower it to 7.2 with muriatic acid. This will lower total alkalinity over time. You will notice that since your total alkalinity is on the higher side, it will cause...

CDC recommendations available here: https://www.cdc.gov/healthywater/swimming/pdf/fecal-incident-response-guidelines.pdf

48 hours of SLAMing for liquid poop should be good. Just remember that you should round your CYA up to 50. Backwash after you are done and leave anything you used to remove the poop in the water so that it is exposed to chlorine. When chlorine level falls below SLAM level you can resume...

Total chlorine of 5 and free chlorine of 3 equals combined chlorine of 2 which means you should SLAM the pool (if those numbers are accurate). What test kit are you using because the K2006 or TF100 don't give a total chlorine result... they give a free chlorine and a combined chlorine result...

Remove all solid contents with skimmer net... SLAM for 24-48 hours, then backwash the filter Leave the skimming net in the pool during the SLAM so any residue on it dies Has the child been sick? Poop liquid or solid? Sick and liquid means more aggressive response. Chlorine level for SLAM...

Why do you want to use pucks? Your CYA will increase. Just let sunlight burn off the extra chlorine and don’t add so much liquid next time. No big deal. Safe to swim up to a SLAM level for your CYA.

Your total alkalinity drop won't be instantaneous. It will go down gradually. Stop measuring total alkalinity so often... just worry about pH/FC/CC for now. pH and total alkalinity are related. If your pH is wacky... your total alkalinity is probably wacky. If pH is fine... then TA is...

Try a 24 hour SLAM and see if that doesn't sort things out. For a CYA of 60, raise free chlorine to 24ppm and hold it there for a day.

Ok, then that points us more toward the CYA level being lower than you might think. The other explanation for chlorine usage going up would be the 4th of july party... but that would have probably stopped or gone back to normal once all the waste in the pool was taken care of by the chlorine...

They sell it for 2.99/gal and occasionally have coupons and sales. Might be a good source for you in the future.

The "other" ingredients are water and a dash of lye. It's the same stuff you would buy at the pool store. No worries at all in using it. Enjoy your free stuff. In checking it seems that there is an Ollie's near you in Ft Myers. Perhaps your friend shops there. ;-)

It's 10%. Bought the same stuff from Ollie's. I think the date code (from what I can see is 19 120s?) is fresh. Should be nearly full strength remaining if so.

EDIT: ignore me

To clarify what above poster said, "super high" chlorine readings that render pH testing inaccurate are anything over 10ppm (which really isn't that high in my opinion). But just want to clarify what he meant by "super high".

If you aren't losing any overnight, then it would seem that your culprit is UV light. Are you sure your CYA level is what you think it is? When you measure, fill the tube to the first line. Look away, and then glance back and see if you can see the dot. Only glance. Do not stare at the tube...

Water looking good! You're doing a great job as a new pool owner.

I also forgot to ask, are you testing combined chlorine? What are you getting for that result? Remember free chlorine and combined chlorine are different.

Typically, if you never let your chlorine drop below minimum (per the chart), you won't ever need to "shock" your pool. However, if you were somewhere in the lower end of acceptable... and then you had a bunch of folks in the pool.... then yes that could have put you in the position you are...

There is a possibility that your CYA is not what you think it is therefore allowing more chlorine to go unprotected and burn off to the sun during the day. We will rule that out or in with the overnight test, but try not to get frustrated. It's all part of the learning process. Have you been...

You may have caught it early. You're doing great by testing and adding and keeping an eye on things. If you do end up having to SLAM, it will be very brief and your chlorine usage will (should) go back to normal afterwards. But we don't know if we're there yet so just perform the overnight...

If you can't do the test tonight, it's not an emergency. You should see about 1-4 ppm per day loss. If anything above that, you should look for alternate causes.

Well, there were a few times I think when your chlorine got below the minimum? Or am I mistaken? You may have a very small little colony of algae growing somewhere consuming chlorine and the only way to know is to perform the overnight test. You want to catch it before the pool turns cloudy...

He is going through 6 or 7ppm per day (per private messages). OP, post here so others can help you and not just me. OP you need to perform the

I suppose I was being extreme, but if you look back through the post history of this thread, you will see that the original poster asked why should he not use trichlor tablets... and I explained that they add cyanuric acid and that liquid bleach was better. Now he asks... well, why can't I use...

You have to add a large dose and then smaller weekly maintenance doses. Check the jacks magic website for their dosing instructions for their stain removers. Specifically the iron removing protocol. I think they tell you to use a whole dang bottle of sequestration agent. I’m on mobile now so...

Those tablets add calcium to the water. Your choice: Pool store method or trouble free pool method. Can’t do both.

CYA would not go up when you added calcium. They are unrelated. You either measured differently this time or more CYA has dissolved. Or you have been using powdered chlorine or tablets and not liquid. But calcium would not raise CYA. Lower your pH to 7.2 and then let it drift back up to...

Looks like a nice place to chill (both figuratively and literally!)... especially on these 95 degree days! Hopefully the fountain is helping to keep your water cooler.

Regular brushing will help keep the tile clean, but the main thing to worry about is the chemistry. Keep your CSI closer to 0 or slightly negative and you won't have issues with scale. See this article: Calcium Saturation Index (CSI) - Trouble Free Pool