Have you noticed rust spots appearing in your swimming pool? It is very common to see rust stains that appear as small brownish, reddish stains and then spread over time. Or you may have a single rust stain in the bottom of your pool that has been sitting there for years.
This simply means that the steel is too close to the concrete shell and must be removed to prevent further damage. It is important to treat these areas properly and remove all surface rust and repair the damage completely before resurfacing or painting your pool.