Fissure in plaster

[cjttaylor]

Our 20,000 gallon plaster salt-water pool was re-plastered in October 2018. Over the past year, we have observed a large number of fissures that are oozing a white substance (calcium ?). Prior to this we have calcium deposits (sharp crystals) on the sides/bottom of the pool. This past winter I checked the pool every 10 days and adjusted pool chemistry (usually adding muriatic acid) to maintain a balanced Langelier Saturation Index. The problem seems to be getting worse. Are there any solutions to this problem?

 

[ajw22]

Looks like calcium nodules. It is a form of spot delamination.

Calcium Nodules in pools

What are calcium nodules? In swimming pools and spas, they are small mounds, bumps, deposits, or “slag” piles of calcium carbonate which are formed from material that has been released from the plaster. The small calcium nodules are rough to the touch, hard, and generally gritty. Nodules may...

www.troublefreepool.com

Plaster Installation and Maintenance - Further Reading

www.troublefreepool.com

 

[cjttaylor]

Our 20,000 gallon plaster salt-water pool was re-plastered in October 2018. Over the past year, we have observed a large number of fissures that are oozing a white substance (calcium ?). Prior to this we have had calcium deposits (sharp crystals) on the sides/bottom of the pool. This past winter I checked the pool every 10 days and adjusted pool chemistry (usually adding muriatic acid) to maintain a balanced Langelier Saturation Index. The problem seems to be getting worse. Are there any solutions to this problem?



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