Brown Algae??? Dirt?

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+1. 50 CYA a month ago either isnt enough anymore, or it dipped since then and now isn't enough. 50 barely cuts it for me in NY and you're probably about 'my summer' out now. Lol.

With recent OCLT passes we are confident it's not organic so then it's the cell or the CYA.

So your choice if you want to chicken or egg.

Either bump the CYA 10 and road test it, or do an overnight *gain* test with the cell at 100%. If you pick up the expected FC overnight but it's not holding during the day, then it's the CYA. If you don't produce as expected overnight, it's the cell.
 
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Guy559 said:
There'll be others with more SWCG experience -- to my knowledge, as long as pump is circulating water (and flow sensor allows SWCG to produce) then there's no additional benefit to running VSP at higher speeds.

I'm also in North Texas and have noticed strong FC depletion during the day due to strong sunshine/UV. Currently in the process of raising my CYA levels up to what's recommended for SW pools. Shooting for 60ppm to start.

I'm running an Aquaria S340 now that I've added salt last week. I had at 50% production but my FC levels kept up pretty high for a bit, so I'm trying 25% now to see if I can sustain where I need to be for FC/CYA range. Pretty sure I'll need to bump back up (or higher) once we hit the heat of the summer...
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I did contact Hayward and put in a ticket. But I retested the CYA and found it to be 50 ....maybe. So with all my other perimeters looking normal, I started adding stabilizer.
It all make sense now why my FC would drop so drastic throuhout the day. from 11 to 3.5to4
I am going to look at my speed controller which 4 programmable speeds to have the pmp come on and run at 1500 to establish the flow senor and then swithc to a lower speed
 
Newdude said:
+1. 50 CYA a month ago either isnt enough anymore, or it dipped since then and now isn't enough. 50 barely cuts it for me in NY and you're probably about 'my summer' out now. Lol.

With recent OCLT passes we are confident it's not organic so then it's the cell or the CYA.

So your choice if you want to chicken or egg.

Either bump the CYA 10 and road test it, or do an overnight *gain* test with the cell at 100%. If you pick up the expected FC overnight but it's not holding during the day, then it's the CYA. If you don't produce as expected overnight, it's the cell.
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I never thought to test it that way....thanks. See this is why this forum is such a good place, all the people willing to help.(y):)
 
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If i had to spitball guess, this is how 91.3% of us figure out our CYA dipped. Just saying. Ain't nobody gonna point and laugh at you if it turns out we have a new member in the club.
 
Newdude said:
If i had to spitball guess, this is how 91.3% of us figure out our CYA dipped. Just saying. Ain't nobody gonna point and laugh at you if it turns out we have a new member in the club.
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I suspect your spitball guess is on point. The next sound your going to hear is my head being removed from my backend. I sometimes get that can't see the forest for the trees.
 
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You can either math the 17 per 24 hours into a fraction, say 1/4 for a shorter 6 hour test (4.25 FC) or select 6 hour runtime in effects of adding (in upper left menu of PM) with 100% and it'll spit out the FC for ya.

Screenshot_20250416_115216.jpg
 
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We're all volunteer here so we don't really have a dog in the fight to keep the forum up and running. But we all love our hobby and dont want to have to find a new one, so THANKS for extending that shutoff date a little further. Imagine if the new hobby we needed involved running ????? *cringes*
 
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Guy559 said:
Think you're spot on. We're a bit up the road in DFW Metroplex. Tons of blown brown/red dust for a week followed by 2+ weeks of continual pollen. Our pollen is a yellow/greenish color but then quickly transitions to a dark yellow/light brown once in pool.
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Same here. I am around Richardson. We had some super bizarre dust events in early March, and now it’s pollen season. It’s been a challenging transition from winter dormancy to swim season. These contaminants come around just as the water temp rises quickly. This is my 3rd spring with the pool but I’m still learning and this transition period is definitely the trickiest.
 
RickRude said:
Same here. I am around Richardson. We had some super bizarre dust events in early March, and now it’s pollen season. It’s been a challenging transition from winter dormancy to swim season. These contaminants come around just as the water temp rises quickly. This is my 3rd spring with the pool but I’m still learning and this transition period is definitely the trickiest.
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Last year was nothing like this year.
 
Everything is back to normal, except very minor dusting
My FC is holding stable between7.5-8.5 throughout the day. CYA=70-80 depending on how one views the black dot. Starts disappearing at 70 and completely at 80.
Once again I would like to thank everyone for their input and help with this. I learned a few things along the way.(y):)
 
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