pool unusual staining

[Jerome W. Young]

I found staining at the sides of this pool. It had white clumps of what looked like a calcium build up and darker staining falling below each of these clumps. They were scattered around the sides of the pool below the water line. I have never seen it before. Anyone know what i am seeing? Photo hard to see. The area is in the top right corner of the picture. :confused:

[Rick Hurst]

Jerome,

It looks like what I have just gone through with our pool.

Calcium.

You could probably drain the pool and acid wash it and be done with it.

White plaster is notorious for such problems.

[Jerry Peck]

"darker staining falling below each of these clumps"

Rust?

From steel, ties, etc. being too close to the surface.

[Rick Hurst]

Jerome,

We just had our pool replastered last week due to those same type of stains. Just a couple of days and around 5500. and it looks completely different.

rick

[Jerome W. Young]

Jerry,
That was my concern. I do not think that is what it is, but I am not going to make that call at this point. I know it needs fresh marcite and I dont want them to find structural issues when they go to remarcite the pool. They will ask me why i did not warn them, so i suggested a pool contractor take a look at it.