Any alternative to acid wash?

[mbar]

I'm sorry, but I don't know of any other way to remove calcium build up from gunite pools. I have never watched an acid wash, so I can't comment on what was right or wrong about how they did yours, hopefully someone who has had it done on their pool will chime in. It would seem to me that they would have been able to get all the stains off if it were done correctly. Anyone out there who can help????

[mas985]

Sandpaper will take off some of it but at the bottom of the pool it could take a very long time to do. You could try to get a long pole with wet paper attachment.

[framcus]

I drained a small (1000 gallon) kiddie pool adjacent to the main pool to remove some iron stains and took the opportunity to examine the light colored stains in smaller pool. While there were a few small scale marks (easily removable by diluted muriatic acid) the more numerous light colored stains appeared, on close inspection, to be slight indentations where the lighter colored underlying concrete was showing through the darker plaster. I presume this would be the same pattern for the larger pool if I chose to empty it.

My assumption is that the acid wash performed 3 years ago actually removed not only the scale marks but also the underlying plaster. Does this seem a plausible explanation? It is hard to know whether this was a botched job or an over vigorous wash on an ageing pool surface. Unfortunately it seems likely I will need to get the pool re-plastered if I am to get any improvements on my present situation. Any thoughts?

On a practical note I have discovered that if I turn all the return nozzles to face upwards the rippled water surface hides the discolorations at the bottom of the pool.

[mbar]

I'm sorry, but I don't know alot about the plaster in the pools. Hopefully someone who has gone through an acid wash and is more familiar with the process will be able to help. Personally, I think the return jets rippling on the water sounds like a really good idea However, since you recently had it acid washed , I would look into what may have happened so that you know in case you do replaster the pool in the future.