Rust markings along pool bottom

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crystallake

crystallake

Bronze Supporter
Sep 30, 2020
47
Los Angeles CA
Pool Size
15600
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Jandy Aquapure 1400
Hello. These rust marks have started to appear along the bottom of my pool. Could these possibly be from the rebar given their shape/size? If so, is there any major concern? It's not ideal, but I can live with it from an aesthetic perspective. I am more concerned about whether it is something critical that needs to be addressed. The pool is four years old.

Pool Rust.jpg
 
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Rebar tends to be laid out in a grid pattern, which means that the lines will tend to be parallel or perpendicular.

Yours looks like maybe a grid, but not exactly.

Maybe it's just pieces of metal that fell in the pool.

Try a strong magnet on a string to see if it sticks to the spots or if it picks up metal pieces.

1704737272468.png
 
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Thank you. I had the same thought regarding the lack of any direct pattern. The only other thing I can think of is that they are building a new ADU on our neighbor's property about 15 feet away from pool edge so it could be nails or screws. I haven't picked anything up in my robot, though. I would prefer it being an external material (nail, screw), as opposed to rebar.
 
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