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I'm sure you meant a couple times a week. I don't want you to scare him off, LOL.

What are all of your levels, and how are you testing?

Follow the money. “Magic potions” generate lots of $$. No need to buy if you follow TFP methods. Most pool stores and pool service company business models rely on pucks and traditional recommendations. The pool service industry would be decimated if everyone followed the science. On the...

The experts have already chimed in, but I wanted to add one thing. You said “I have more of a check question as to whether it is normal algae growth or excessive”. To be clear, there is no normal algae growth. Those that test regularly and follow TFP parameters don’t get any algae. I never...

Here’s an analogy for you. Algae is like the canary in the coal-mine. Its growth is telling you that your chlorine is too low (in your case 0). What you are doing is the same as just removing the canary from the coal-mine. Yes, that would save canary lives, but would do nothing to address...

That controller has a spillover function. Check the manual. I permanently closed my manual spa valve and program a spillover for 30 mins twice a day.

What controller do you have?

Use 5ml sample instead of 10ml.

Is there a run on pool liquid chlorine? We know it’s the same as bleach, just a little stronger, but do most people?

Here’s some reading for you: https://www.troublefreepool.com/blog/category/pool-school/algae/ 7.5 is likely too low, but you’ll need to know your CYA level. https://www.troublefreepool.com/blog/2019/01/18/chlorine-cya-chart/ How are you testing your water?

It has calcium in it which will build up in your pool and lead to scaling. Not to mention the other issue with shocking. Not sure why you keep posting here if you won’t take the advice. Again, the best (and cheapest) way to chlorinate your pool is to put in just what it needs daily. The...

DO NOT PROCEED UNTIL AN EXPERT HAS CHIMED IN! I think they meant for you to refill first, then SLAM. They also told you not to pressure wash it. I’m not sure it’s a good idea to put bleach directly on your plaster, but again, let an expert say that.

The HDX is a lot cheaper. $4.48 for one gallon of 3% (maybe 5%) vs $9.98 for 3 gallons of 10%. Plus, no above mentioned foaming.

You need a test kit that has a FAS-DPD test as part of it. It tests up to basically an unlimited chlorine level. If you like the rest of your current test kit, you can just buy it. Here’s one on Amazon: Amazon.com : Taylor Replacement Reagent FAS-DPD Refill Kit (Large) - Over 100 Tests ...

You’re never really killing the algae completely, you just knock it back and then it regrows. You need to SLAM. Following the instructions below EXACTLY, no shortcuts. Call your CYA 70. SLAM - Shock Level and Maintain - Trouble Free Pool

42? That sounds like a pool store value. How are you testing your water? Using Trichlor I suspect it is much higher. Your chlorinator, even at “full blast”, still relies on the dissolve rate of pucks.

Since you already have a test kit, you just need to add one of these: https://tftestkits.net/FAS-DPD-Chlorine-CC-s-test-p47.html https://www.amazon.com/Taylor-K-1515-FAS-DPD-Chlorine-75oz/dp/B003V4YZEO I also recommend getting the speedstir, it makes all your testing easier...

I see your test kit in your signature now. You need a FAS DPD kit to properly test for chlorine. Your issue is that you haven’t been slamming at all.

What test kit are you using? I noticed you reported Total Chlorine and combined chlorine. If those numbers are correct, your free chlorine is only 1. Well below slam level and also below the recommended minimum.

What is "salt shock"? It's best not to rely on the marketing-speak product name and instead look at the ingredients. The word "shock" in the product label usually means it has some type of chlorine. But not always, you can find non-chlorine shock in the product name too. Avoid those. As...