Almost every stain we get called out for in Henderson and Las Vegas traces back to one thing: hard water. Nevada’s tap water carries high mineral content, and once those minerals settle into plaster or tile, they don’t rinse away with a brush and some chlorine. Here’s how to tell what you’re dealing with and what actually gets it out.
Scale vs. stains: they’re not the same problem
Scale is mineral buildup sitting on top of the surface, usually white or gray and rough to the touch. Stains are discoloration in the surface itself, often caused by metals (copper, iron) reacting with chlorine, or algae that’s been allowed to take hold. Scale can often be brushed or acid-washed off; true stains usually need a targeted chemical treatment or, in bad cases, resurfacing.
The most common stains we see here
- White/gray scale at the waterline — calcium carbonate from hard water, worsened by evaporation concentrating minerals at the surface.
- Rust-colored or brown stains — usually iron in the fill water or from corroding metal equipment.
- Blue-green or teal staining — copper, often from an aging heater or from certain algaecides reacting with chlorine.
- Dark green or black patches — algae that’s taken root in rough plaster, common in pools that sat uncirculated for a stretch.
Why DIY stain removers often disappoint here
Generic stain-removal products are formulated for average water conditions. With water this hard, the same product often needs a different dose, a different pH window, or a metal sequestrant added first, or the stain just comes back within a few weeks. This is the single biggest reason we hear “I tried a product from the pool store and it didn’t work.”
What actually works
Correct sequencing matters more than any single product: identify the stain type first, address the underlying water chemistry (often a sequestrant for metals, or a calcium hardness adjustment for scale), then treat the stain itself. Skipping straight to a stain remover without fixing what’s causing it is why the same spot keeps coming back.
If you’re dealing with recurring staining, our water testing and analysis service identifies exactly which mineral or metal is causing it, so the treatment actually holds instead of fading back in a month.
