Translucent particles

The Spaniard

New member
Apr 19, 2020
3
Murfreesboro, Tennessee
Hello, My pool construction was completed Sept 2020. I have a fiberglass 19k gallon pool with a Pentair system including 3 hp VSP pump and cartridge filter. I use TFP and pool math and have all chemicals in or close to range. Water in daytime is absolutely clear. Yet when the pool lights come on there is particles floating everywhere. I replaced filter 3 weeks ago with a brand new after the old was overused to clean out the construction mess. I read on TFP not to aid unnecessary chemicals to clarify so asking for help.
 

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mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
37,091
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Your FC is on the edge of low for a CYA of 100. You also have been adding a number of dry additives recently. Including sodium bisulfate (dry acid) that will destroy your SWCG. So I would suggest you discontinue that.

Do you have pollen in the air in your area?
 

The Spaniard

New member
Apr 19, 2020
3
Murfreesboro, Tennessee
Not really a lot of pollen at all.
Last year after the builder finished I could not keep chlorine in the pool . I realized my CYA was non existent therefore I may have over done it the first time adding it . I will move away from dry acid thanks for the suggestion!
 

bmoreswim

Mod Squad
Gold Supporter
Platinum Supporter
LifeTime Supporter
Jul 16, 2012
6,814
Central MD
Pool Size
27000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite (T-15)
Good chemical catch by Marty. For the specks in the water, I believe you are seeing what are often referred to as floaties. Just normal stuff in you water this is only visible with the pool lights on. The solution, if you care to address it (it's not necessary - aesthetic only) is to run your filter longer. We both have cartridge filters (sand will leave a few more and DE a few less). I can prove that will work because when I close my autocover (so zero debris is entering), and continue to run my pump a lot (say 12 hours or more) I can get the number of floaties down to a very low number. Normally, with my pool cover open, I probably have about half of the number you have, if my view of your picture is accurate.
 
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BenB

Gold Supporter
Jul 24, 2020
102
San Jose, CA
It is a shame that you're starting off with such a high CYA given it's a brand new pool. By itself it's not a huge issue but one complication I can think of is that you'll be running up against 10 FC a lot of the time and at that level your pH test, which is a bit fiddly to read well to begin with, will then not give you accurate readings and you'll be left in the dark on your pH result that is very important to keep on top of.

Not sure what your fill water situation is, but given your water temp is still low and likely not swimmable for a little while longer, not sure what you might think to a partial drain and refill to get that level down a bit?