Unusual Stains - Pool Bottom

sobczakrap

New member
Jun 16, 2024
1
The Woodlands, TX
Pool Size
14000
Surface
Plaster
Chlorine
Liquid Chlorine
Hey everyone, just bought a house with a pool 5 months ago and have a buddy that turned me on to the TFP method - appreciate everything I have seen so far!

I am having some recent issues with staining at the bottom of the pool in different places. Stains measure around 1/4” thick by up to 2” in length (see yellow ring for reference). I have tried rubbing with both Cl pucks and Vitamin C without any luck. Scrubbing with an iron brush did nothing. The stain quantity has been growing pretty quickly - over the last four days its gone from maybe 10 marks on Day 1 to now close to 100.

No staining on sides. No metal objects in pool. Polaris sweeps the pool daily so nothing sits on the bottom. Pool and all equipment is less than five years old.

Anyone seen this type of staining before? TIA!

Garret
 

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Hey everyone, just bought a house with a pool 5 months ago and have a buddy that turned me on to the TFP method - appreciate everything I have seen so far!

I am having some recent issues with staining at the bottom of the pool in different places. Stains measure around 1/4” thick by up to 2” in length (see yellow ring for reference). I have tried rubbing with both Cl pucks and Vitamin C without any luck. Scrubbing with an iron brush did nothing. The stain quantity has been growing pretty quickly - over the last four days its gone from maybe 10 marks on Day 1 to now close to 100.

No staining on sides. No metal objects in pool. Polaris sweeps the pool daily so nothing sits on the bottom. Pool and all equipment is less than five years old.

Anyone seen this type of staining before? TIA!

Garret
Can you post a jpg instead?
 
Hey everyone, just bought a house with a pool 5 months ago and have a buddy that turned me on to the TFP method - appreciate everything I have seen so far!

I am having some recent issues with staining at the bottom of the pool in different places. Stains measure around 1/4” thick by up to 2” in length (see yellow ring for reference). I have tried rubbing with both Cl pucks and Vitamin C without any luck. Scrubbing with an iron brush did nothing. The stain quantity has been growing pretty quickly - over the last four days its gone from maybe 10 marks on Day 1 to now close to 100.

No staining on sides. No metal objects in pool. Polaris sweeps the pool daily so nothing sits on the bottom. Pool and all equipment is less than five years old.

Anyone seen this type of staining before? TIA!

Garret
That's rust. Some looks like they are from a hairpin (bobby pin) or a nail that sat there.
 
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