Hi from Texas

Tested 24 hours after adding.
Circulate for a half hour and retest to ensure you reached target. High values may be higher than they appear if they're off scale. For example, an 8.4 may come down 0.4 as you dosed, but still be an 8. Or higher if it started higher. Tomorrow looks like no change if you don't confirm the Ph hit target.

Once you consistently hit target and know how it behaves, you can skip the confirmation test. You'll get into a schedule quickly.
 
20 Baume 31.45% MA. Tested 24 hours after adding. Yes, added in front of a return.
It is best to test 30-45 mins after adding MA to determine if you got close to your target drop in pH. If you had any aeration then that offset some of your pH drop, plus your higher TA allows pH to increase, even over 24 hours. It is all getting to know your pool. There is no need to be overly concerned about every movement of the pH. Work on it over time and your TA will come down and help stabilize the pH.
As others have said, a short term high pH is not going to have long term effects.
 
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Welcome and looks like everyone has you covered.

Just a note on your 50lb bucket of tabs, they will not go bad and tabs are okay to use in TFP (sometimes) so no need to get rid of them. People get in trouble blindly using tabs as their sole source of chlorine and allowing their CYA to get way too high. You will have plenty of opportunities to use them over the next few years, including boosting your CYA when needed and when on vacation and not able to add liquid chlorine on a regular basis. My CYA is a bit low so I have 3 tabs in a floating dispenser in my pool currently.
I agree with JJ -- This is about the only time I use Tabs (once I learned)
"boosting your CYA when needed and also when on vacation"

You can trust the advice given here at TFP.
No one is trying to sell you anything.
They just want to help you have a gorgeous pool.

 
Circling back to the cleaning of the exposed edge of our fiberglass pool. I tried a Magic Eraser and it was completely useless. Does anyone have any other suggestions? This is something I’d like to add to my maintenance routine as it appears there’s a bit of grit or grime formed on the sides. Some of it was leftover from install and some is just grime. I attached a photo.

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Did you try my recommendations here:

 
Did you try my recommendations here:


I did not. I will try that today. For maintenance once it’s off; do I use Windex or some other chemical?
 

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I learned this the hard way. The pucks outgas chlorine - especially in a hot garage. This chlorine gas will seriously damage even stainless steel. Golf clubs, tools, anything.

I don’t have a shed. And if I did, I would keep things such as my shovels, rakes, and lawn equipment in there. Would those not get damaged there as well? It is extremely hot in Texas during the summer.
 
I don’t have a shed. And if I did, I would keep things such as my shovels, rakes, and lawn equipment in there. Would those not get damaged there as well? It is extremely hot in Texas during the summer.

I just keep mine outside in a polyethylene storage box with no metal items inside. It probably depends on ventilation in the shed.
 
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Now I have a question about Koolcote. Since I bought my test kit, I have been testing on the patio. Right where I’m testing I’ve noticed stains, presumably from dripped / spilled water that has reagent in it. Any suggestions to get these removed safely? Huge bummer this has happened but I’m hoping it can be cleaned up. I have attached a photo.
 

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