Calcium on plaster?

[Green Builder]

It looks like I have the same problem, but I also have big bumps of calcium deposits at the bottom of my shallow end? Not quite sure if it is calcium or? Can someone give me advice, as I think I need to relate too.

 

[Green Builder]

Bad pictures

 

[Green Builder]

relate = replaster

 

[ajw22]

Hard to see the problem in your pics

Is this a new pool or was it replastered?

Plaster Installation and Maintenance - Further Reading

www.troublefreepool.com

Read this and see if it looks like the calcium nodules described.

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 form singularly (far apart or sporadically), or many and close together along a crack in the plaster surface.