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Copper Stain Treat
1lb per 20,000 gallons
Blue-green stains on your pool surface are clear sign that you have a copper problem. Maybe you’ve been using copper algicide or have a pool heater. Either way we’ll show you the fast and easy way to remove your copper pool stains.
Steps
minute(s)
Turn off your pump system and bypass the timer.
Lower the chlorine level to below one (1) ppm – the lower the better – by either abstaining from adding chlorine or using a chlorine neutralizer, such as No Mor Chlor™ or an equivalent product.
Lower the pH to 7.2 and the Total Alkalinity to 80 ppm or below by using a pH decreaser and Alkalinity decreaser, such as No Mor Muriatic Acid™ or a conventional liquid acid. If you need to lower only the alkalinity, you can use Easy Alkalinity Down™ or an equivalent dry acid.
Add 1 lb of Copper Stain Treat™ per 10,000 gallons in the following manner:
For pools where color fastness is a concern, or for areas with widespread staining, dissolve Copper Stain Treat™ in a clean bucket of water before pouring it evenly around the perimeter of the pool. Some clouding is normal and will subside in 24 hours.
Wait 12-24 hours for results. Repeat the application until all stains have been removed.
Raise the pH using Easy pH Up™ or Sodium Bicarbonate (Baking Soda).
Soda Ash is not recommended as it may lead to stains reforming.
Raise the chlorine reading slowly, avoiding increases of more than 5 ppm per dose per day. Larger doses may cause staining to reform.
Use a stain preventative such as No Mor Stains & Scale™ weekly to keep the pool free of stains.
Creating a happy pool environment starts with understanding what’s in your water. Those distinct blue, green, black, or dark purple stains are actually oxidized copper attaching itself to your pool’s surface. But how does the metal get there?
Generally, copper enters your swimming pool through one of two pathways:
Once the copper is in the water, a “trigger” event—like a high pH spike or a heavy shock of chlorine—causes the dissolved copper to fall out of solution (precipitate) and plate onto the walls and floor. It’s chemistry gone wrong, but don’t worry—we can fix it.
To remove the stain, we must break the bond between the oxidized metal and your pool surface. Products like our Copper Stain Treat™ are designed to act as a powerful reducing agent. When applied, the treatment chemically solubilizes the metal, effectively “lifting” it off the plaster or liner and putting it back into the water in a dissolved state.
Once the copper is floating freely again, it is crucial to use a sequestering agent. Think of this as a chemical magnet that grabs onto the copper ions and holds them tight, preventing them from oxidizing and re-staining your pool. This ensures you aren’t just treating the symptom, but solving the problem for good.
