Clearing up yellow algae dust quick, temporarily?

spacey

Member
Aug 7, 2022
20
Oklahoma
Pool Size
18500
Surface
Vinyl
Chlorine
Liquid Chlorine
I've read through the SLAM method here and started it yesterday. Sounds great, added 4 lbs of CYA (level was zero before addition).

Pool is 18,000 gallons, in ground, vinyl, sand filter 300 pounds, new pump is running 24/7.

TC is 2, FC is 3 but should be increasing soon.

I've been using calcium hypochlorite granules from In The Swim, but was not checking it every day, now I will. There is no liquid chlorine in town at all, I saw in the forum you guys suggest this, ordered from Amazon today.

My chlorine tablets had gone out, so now there's Trichloro-s tablets in the floater.

So my problem is, people are coming over starting in 24 hours, the SLAM thing is not going to fix this by then.

I had a yellow algae bloom a few days ago, I bought Yellow Out and used 6 pounds for 18,000 gallons which is overdoing it.

I added 4 cups of that fiber cellulose this morning to the skimmer to try to filter smaller sizes of dead algae. I've stopped backwashing the sand filter.

I don't think there's enough time for any of this to work by tomorrow or the next day.

So if I dump flocculant in the pool, can I just turn off the pump for 16 hours, let it settle, and then run the sand filter pump from skimmer only to the return jets since the majority will settle in the deep end? Maybe it won't stir up the junk for 4 days?

I've tried vacuuming to waste, it works at first, and after 10 min the water turns milky white all the way to the top stair.

The algae is dead I believe. The water isn't yellow or green, but it's very cloudy.

I guess my main question is, will the floc keep the dead algae on the bottom for 4 days if I keep the main drain out of the loop of the sand filter????

I could waste out to the street for the next few hours, then replace with hose water for a half day, but I just put a lot of money if chemicals in there the last day or so.
 

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Welcome to TFP and sorry to hear about your troubles. I'm sorry to say there is no magic here for getting a messed-up pool in shape in a day. Yours is a complex set of problems, mostly arising from throwing too much at it, and definitely too much ineffective and conflicting approaches.

Trouble Free Pool Care (TFPC) is based on self-testing, only using effective chemicals, not using chemicals that conflict with one another, and applying sound principles of pool care.

To minimise the dust, you could shut off the pump overnight and then vacuum to waste, moving the vacuum excruciatingly slowly so as not to stir up the dust. It won't be great, but it might be marginally better. Dump in some liquid chlorine just before the pool party so it's at least safe for a little while. God only knows how much, but try one gallon. The minute people jump in, or you turn the pump on, whatever is on the bottom will get stirred up. Better yet, just tell your guests that you have some major work on the pool coming up, and it's in the prep stage, and is not yet ready for swimming.

You will need to decide whether or not you want to adopt TFPC and never experience this again. Here's a good place to start, to get a feel for it. Read most, if not all, of the 9 sublinks:
Pool Care Basics
 
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Bleach from amazon is obscenely overpriced and could likely be so old to be worthless. Do you have Ace Hardware, Walmart, Home Depot, or any janitorial services nearby? All of those are much better options for purchasing chlorine. You can also look at 6% bleach with no additives - often found at Walmart/Aldi, etc.

Most everything else you're doing is making your problem worse, not better. But I understand you're trying to save a bad situation.

You need a proper test kit - do you have either one of the recommended units?
Test Kits Compared

You should also strongly consider a salt water chlorine generator if liquid chlorine is not available easily.
 
I assumed as much, that a quick fix wasn't possible. I can have mostky clear water if the pump.is off, but will another algae bloom occur in 4 days?

The Yellow Out claims it keeps all algae dead for 10 days. Is that possible?

I think it will either be no swimming, or cloudy swimming.

It's safe health wise right?
 

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Sufficient FC levels is what makes water safe to swim. Algae is a nuisance but points to a broader issue - improper sanitation.
If I were you, I'd feel a lot better about things if you can go out and find some liquid bleach. Strong FC levels will knock down algae while also protecting swimmers from viruses/bacteria.
 
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Also - fyi, that products with "blue" in the name contain copper and will cause really troublesome stains to pool surfaces. Best to avoid.

Any local pool stores you can buy calcium hypochlorite (powdered shock?) That'll help increase FC levels but also contains CH. Until you have a test kit, can't say how good or bad an idea CalHypo is...
 
Bleach from amazon is obscenely overpriced and could likely be so old to be worthless. Do you have Ace Hardware, Walmart, Home Depot, or any janitorial services nearby? All of those are much better options for purchasing chlorine. You can also look at 6% bleach with no additives - often found at Walmart/Aldi, etc.

Most everything else you're doing is making your problem worse, not better. But I understand you're trying to save a bad situation.

You need a proper test kit - do you have either one of the recommended units?
Test Kits Compared

You should also strongly consider a salt water chlorine generator if liquid chlorine is not available easily.
Strangely Walmart, Home Depot, Lowes, Ace, and 3 pool stores had no liquid chlorine. Not sure why. Will buy a test kit tomorrow. I've been using strips, though they do have CYA and FC on it.
 
Sufficient FC levels is what makes water safe to swim. Algae is a nuisance but points to a broader issue - improper sanitation.
If I were you, I'd feel a lot better about things if you can go out and find some liquid bleach. Strong FC levels will knock down algae while also protecting swimmers from viruses/bacteria.
Since I have no liquid chlorine, what about Clorox 6 in 1?
 

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Please don’t add yellow out! You think you’ve got problems now adding ammonia will only make things worse then good luck even trying to slam - it takes a ton more chlorine to overcome ammonia!
same goes with floc- it almost never works like the package says.
Liquid chlorine is the answer
Be sure you get a tf100/pro or Taylor k2006c
These are the only ones that have all the tests you need.
 
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Problem is the addition of copper, but better than nothing. Use PoolMath to determine correct dosage. I'd target SLAM level for initial dose for maximum effect.
PoolMath
& it adds cya (1ppm for every 1ppm of fc) thus increasing the necessary slam level
FC/CYA Levels
 
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By the way, regarding test strips..., the best description I ever heard was that about the only use for them is to pile them in a tee-pee shape, light them on fire, and cook a hot dog. But don't feed the hot dog to any humans or animals.
 
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Please don’t add yellow out! You think you’ve got problems now adding ammonia will only make things worse then good luck even trying to slam - it takes a ton more chlorine to overcome ammonia!
same goes with floc- it almost never works like the package says.
Liquid chlorine is the answer
Be sure you get a tf100/pro or Taylor k2006c
These are the only ones that have all the tests you need.
Well Yellow Out was already added yesterday so that's a moot point. I've got liquid chlorine coming in the mail.
 

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