Black Stains In Your Pool After Winter? ⚫️ - Video

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If you're seeing black or brown stains in your pool after winter, you've probably got metals in your water. And unfortunately, they got worse while your pool sat covered.

Here's how to tell what's staining your pool: if the stains are greenish-brown, that's probably iron from rusty equipment or well water. If they're black or purple, you're dealing with manganese that's been sitting in your water all winter.

To remove these stains, don't waste money on expensive stain removers. Instead, add ascorbic acid (that's vitamin C) directly to the stained areas. If the stains start to fade, you know it's metals.

Then, shock your pool with a non-chlorine shock. Regular chlorine shock will actually make metal stains worse by oxidizing the metals in your water. Finally, add a metal sequestrant to prevent those stains from coming back.

Swim University makes pool and hot tub care easy for millions of homeowners. Each year, we continue to help more people with water chemistry, cleaning, and troubleshooting. We know taking care of a swimming pool or spa can be difficult. And it’s hard to find a trusted source of information. This is the reason we created Swim University.

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