Algae or bug/worm organic stains?

[stevenl241]

Hi - seeing a lot more light brown spots of staining (a few inches long each, scattered around the pool.
Have in the past only seen this if a worm got in the pool and decomposed leaving a shadow of it's shape.
The spots don't come off even with aggressive wire brushing
I can't tell if I am now getting algae or just more organic staining...
Haven't had algae bloom and haven't needed to shock/slam for years.
Weather has been extreme heat wave, along with heavy use of the pool.

TF-100 test kit:
FC 8.0
CC 0.0
CYA 65
CH 200
TA 110
pH 7.6

Please suggest some definitive way of identifying these stains....

Thanks,
Steve

 

[ajw22]

Your CC says no algae but do a Overnight Chlorine Loss Test

You put a chlorine puck on the stains for a few minutes?

Stains in Your Pool

The stained pool is beyond embarrassing. Our in-depth Guide to remove stains in your pool will help you to remove the stains and prevent them in the future.

www.troublefreepool.com

 

[stevenl241]

Hi - seeing a lot more light brown spots of staining (a few inches long each, scattered around the pool.
Have in the past only seen this if a worm got in the pool and decomposed leaving a shadow of it's shape.
The spots don't come off even with aggressive wire brushing
I can't tell if I am now getting algae or just more organic staining...
Haven't had algae bloom and haven't needed to shock/slam for years.
Weather has been extreme heat wave, along with heavy use of the pool.

TF-100 test kit:
FC 8.0
CC 0.0
CYA 65
CH 200
TA 110
pH 7.6

Please suggest some definitive way of identifying these stains....

Thanks,
Steve

Yes, I put a trichlor puck on the st

Your CC says no algae but do a Overnight Chlorine Loss Test

You put a chlorine puck on the stains for a few minutes?

Stains in Your Pool

The stained pool is beyond embarrassing. Our in-depth Guide to remove stains in your pool will help you to remove the stains and prevent them in the future.

www.troublefreepool.com

Your CC says no algae but do a Overnight Chlorine Loss Test

You put a chlorine puck on the stains for a few minutes?

Stains in Your Pool

The stained pool is beyond embarrassing. Our in-depth Guide to remove stains in your pool will help you to remove the stains and prevent them in the future.

www.troublefreepool.com

Yes, I put a triclor puck on a couple of the stains and if anything it made them a little darker....still don't come off scrubbing with wire brush.....

 

[ajw22]

Sounds more like metal staining.

There any work around your house or neighbors that could have caused slivers of metal to fall into your pool?