Returned from vacation to this...

BurninMoney

Member
Jul 5, 2017
22
Fort Worth, TX
Been maintaining pool for 3 years with chlorine and TFP methods. Came back from vacation to this. What in the world is it? I can't remove with a pool scrubber.
Pool had chlorine added in liquid and tablet form while gone. Pool is clear with exception to this.

I've not ever used any ironizer or anything special in the pool. Liquid chlorine and acid balancer and that's it. Last pool store check of all levels (including TDS and CYA were in check).

Pic from night cause I just discovered. It's brown.
 

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mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
21,235
Laughlin, NV
Sap is organic. So a puck set on it should clear it.

Can you scrape any of it off or is it a smooth stain?
 

jblizzle

Mod Squad
TFP Expert
LifeTime Supporter
May 19, 2010
43,202
Tucson, AZ
Kind of looks like an iron stain to me. See if a vitamin C tablet will lighten it
 
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aussieta

Gold Supporter
TFP Guide
Been maintaining pool for 3 years with chlorine and TFP methods. . Last pool store check of all levels (including TDS and CYA were in check).
pool store testing is not tfp methods
i would say it is duck poo or other animal
 

BurninMoney

Member
Jul 5, 2017
22
Fort Worth, TX
Thanks all. Chlorine puck looks like it did the trick. We'll monitor.

Had a few storms roll in while gone, so either sap or definitely could have been ducks. We've got them around here. Usually I'm on top of it when I see it in the pool but given we we're out, that could have been it.