What does dead algae look like

[Shellbird]

I've drained down my pool to start trying to irradiate the algae. The water does seem to be getting clearer but I don't know what to expect while the algae dies.

What can I expect to see? Small 1080 gal UGP.

 

[ajw22]

Are you following...

Guide for Seasonal/Temporary Pools

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[Shellbird]

Loosely. I drained the pool almost all the way, cleaned.
Yesterday afternoon:
My FC was 10
pH 7
TA 80
CYA 60

Did a test strip and FC was still high but saw evidence of algae today and dumped some more bleach in the pool. About 2 pints.

 

[Shellbird]

Green tinged, tends to sink to bottom

 

[ajw22]

You need a better test kit then test strips.

With CYA 60 you would need to raise your FC to 24 to kill all the algae in the water.

You should target your CYA to be 30-40. 60 is too much for you.

Drain as much of the water as you can and start fresh.

 

[Shellbird]

I'm using the TF-100 test kit, just did a strip as a supplement. The values are from the TF-100

 

[Shellbird]

The summer sun has been brutal! I opted for a slightly higher CYA level. I was under the impression for the intense UV it might help. Was that not correct?

 

[Shellbird]

I'm now at SLAM level, 24 FC. I'm not wanting to drain the pool again.

 

[Shellbird]

So let's say my endeavors work, what happens to the algae, will it just end up in my filter or will it be dead in the pool and sink to bottom? How do I get it out?

 

[ajw22]

The summer sun has been brutal! I opted for a slightly higher CYA level. I was under the impression for the intense UV it might help. Was that not correct?

I think CYA 60 is unnecessary in a pool your size and it requires maintaining higher chlorine levels. I think it complicates water chemistry more than it helps. And with CYA 60 you still got hit with algae.

CYA 40 and a FC level of 8-9 would have probably kept you algae free.

 

[ajw22]

So let's say my endeavors work, what happens to the algae, will it just end up in my filter or will it be dead in the pool and sink to bottom? How do I get it out?

Some dead algae will sink to the bottom. Most folks have some type of pool cleaner to clean dirt and dead algae out of the pool floor.

 

[Shellbird]

My chlorine was getting gobbled up daily, I only recently realized how to read the pool math chart for the correlation of the numbers vs looking at them individually. Next year I'll run the CYA lower but I've only got a month or 2 left of summer. If I can knock this out and keep it going I'll do better next year.

 

[kellyfair]

Keep brushing and stirring it up so it goes into your filter. Vacuum too.

 

[Shellbird]

Thanks Kelly, I think I finally got it killed but day 2 of my SLAM and we had a heavy rain storm... had to reset it all over quickly.
I get a little spot of icky green stuff at the bottom and residue in the seams.
Learned the word perseverance. I refuse to let this happen again!
My little pool filter is barely adequate. May need to buy a vacuum.