Plaster staining - molting?

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Amwilki

Amwilki

New member
Jun 23, 2021
3
Kent Island, MD
This is our second year of new pool. Our pool guy opened and we notice the pool discoloration.We had him
Maintain chemicals all winter, and it was fine when he closed it. He suggested pouring chlorine granules and let is sit for a few hours then scrub. Didn’t work.
could it be molting? Primarily on bottom of pool but noticed on sides as well. They are acid washing under warranty. Could this be molting? Very frustrated! Thanks!
 

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The pictures looks like this issue.

White Spotting of New Plaster Pools

The problem of plaster spotting has been an ongoing puzzle and controversy in the swimming pool industry for over three decades. The generally round, smooth-yet-unsightly white soft spots in new plaster pools have long been a source of contention among pool plasterers, and pool chemical service...
www.troublefreepool.com www.troublefreepool.com
 
Unless the pool has dirt stains on the bottom, these two articles may describe what has happened to your pool.

How White Pool Plaster Can Turn Gray

One would think that when mixing white cement with white limestone aggregate, the final pool plaster product would always be white. But that is not always the case. Unfortunately, white pool plaster sometimes turns gray (or grey) either immediately or a few months after the pool is filled with...
www.troublefreepool.com www.troublefreepool.com

How White Pool Plaster Can Turn Gray

One would think that when mixing white cement with white limestone aggregate, the final pool plaster product would always be white. But that is not always the case. Unfortunately, white pool plaster sometimes turns gray (or grey) either immediately or a few months after the pool is filled with...
www.troublefreepool.com www.troublefreepool.com
 
Last edited:
onBalance said:
Unless the pool as dirt stains on the bottom, these two articles may describe what has happened to your pool.

How White Pool Plaster Can Turn Gray

One would think that when mixing white cement with white limestone aggregate, the final pool plaster product would always be white. But that is not always the case. Unfortunately, white pool plaster sometimes turns gray (or grey) either immediately or a few months after the pool is filled with...
www.troublefreepool.com www.troublefreepool.com

How White Pool Plaster Can Turn Gray

One would think that when mixing white cement with white limestone aggregate, the final pool plaster product would always be white. But that is not always the case. Unfortunately, white pool plaster sometimes turns gray (or grey) either immediately or a few months after the pool is filled with...
www.troublefreepool.com www.troublefreepool.com
Click to expand...
Thanks! That’s good info and sounds like perhaps my case. So hard to convey by pic. In person is clearer. This is the deep end. All on the bottom is dark.
 

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