Greyish white gritty sand on bottom of pool

jraymond1706 · 2025-05-21T15:02:47-0400

I keep finding this sand like substance in our robot and when I bush bottom of pool it clouds up. I assume it is plaster our pool is about 23 years old and we’re plastering it next month. Store to think it could be that or it could also be sand? Can anyone tell me what they think it looks like and if it’s sand where could it be coming from? I don’t think it’s something blowing into the pool

30,000 gallon
Gunite pool with SWG

YippeeSkippy · 2025-05-21T15:09:47-0400

Do you have a sand filter? A bad O ring under a Multiport Valve can let sand in to the pool.
If you want to try to figure out if its calcium- scoop a bit on tp grass and add a few drops of Muriatic Acid. If it fizzes its calcium.

Please fill out a signature line giving us more details about your pool and equipment, and how you test and sanitize.

Maddie :flower:

jraymond1706 · 2025-05-21T17:03:28-0400

YippeeSkippy said:
Do you have a sand filter? A bad O ring under a Multiport Valve can let sand in to the pool.
If you want to try to figure out if its calcium- scoop a bit on tp grass and add a few drops of Muriatic Acid. If it fizzes its calcium.

Please fill out a signature line giving us more details about your pool and equipment, and how you test and sanitize.

Maddie

Thank you and I will!
I have a cartridge filter

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Greyish white gritty sand on bottom of pool

jraymond1706

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YippeeSkippy

jraymond1706

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