Green pool question

Macyc

Silver Supporter
Apr 25, 2023
84
Florida
Pool Size
25000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
About 4 months ago, my mother in law moved into a memory care facility. The pool guy she used had been billing monthly as usual. However, there is no way he was showing up regularly. Long story short, I went by there to check on some things and the pool was beyond green. I’d call it slime. It was disgusting. Something I’ve never seen.

I tested the ph in order to start the SLAM process. The ph was so high, I couldn’t guess a number. I added acid to my best guess and waited an hour to start SLAM. Day 1-4, each day looked better than the one before. Today, day 4, I can see the bottom and it seems clear with a little room for a bit clear-er. Although, this morning, it did pass the overnight test. I didn’t bother doing an overnight test the days before.

Currently, the chlorine level is 25.

I changed the cartridge in the filter all together.

This pool is a dinosaur. Went in with the house build in the early 80’s. The only thing ever updated(if you call it that), is the pump and filter. On the filter casing, the date says 2015. It is a pentair clean and clear, takes a 100 size cartridge filter. Has a pentair pump that’s old also. And only one valve. Which confused me on how to set it. I kind of figured out it’s supposed to be in between skimmer and drain so they are both open.

My question is: where from here? My pool uses a swg and I maintain it myself. I don’t exactly know if the levels are the same as i would use for my pool. In my pool, I keep my chlorine at a 5-8. Is that the same when maintaining a pool without a swg? It’s concrete, in ground standard 1980 sorta kidney shaped kind of pool in Florida. Do I stop adding chlorine and wait for the level to be below 10 to test all the other levels like I would in my pool if I had a reason to slam? Which I wouldn’t because I learned here 🤣.

Last, should I go ahead and keep the filter running 24/7 until it’s even more clear? The pool is also screened in, if that matters at all.

I attached pictures of day 1-4. Today is day 4.
 

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The house will be up for sale soon so I’m not going to install a swg. It also doesn’t get any use, and won’t before selling. So all I need to do is keep it clear between now and when it goes up for sale to selling. So I’ll use chlorine. And I wasn’t sure if using chlorine, the numbers are different than what I use for my own pool with a swg.

So I can test alkalinity and cya now and adjust if needed with the chlorine so high?
 
The CYA should have been tested prior to loading it up with chlorine. For now, measure the CYA (you have a proper test kit for that?) and then that will determine where your chlorine should be for your SLAM and for afterwards.
 
Yes I have the proper test kit from my own pool. I’ll test it, now that I’m not hesitant to stick my hand in it
 
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