Yellow Stains In Gunite Pool

Sometimes it can be fairly easy to get rid of stains but other times those hard to remove spots can take a bit more than a simple scrub.

Yellow stains in gunite pool.

I show examples in a pool of yellow algae and some stains on the pool plaster that looks like yellow algae. Pool steps can leave stains and rust on the finish and age can take a toll on the finish. Over 40 years of expertise has given us the knowledge to handle any pool stain situation. Your first clue to diagnosing a pool stain is to check out it s color.

Shades of yellow can be a sign of excessive iron. Unlike algae iron deposits resist scrubbing and take a lot of elbow grease to remove. It should be used for pool openings and closings and throughout the season. The most common blemish however is usually fading caused by sun damage and tears caused by equipment or debris in the pool.

Sold under many names such as mustard buster or yellow out or yellow treat these chemicals are added to the pool at the same time as the shock after balancing the water. Vinyl is another pool finish that causes trouble. Iron can be introduced into a pool by well water or pipe corrosion somewhere in the pool system. Vinyl is more resilient when it comes to staining but it s not immune.

However by following these instructions you might be able to eliminate them. Pool stains on the wall or floor of a swimming pool can be caused by metals in the pool water or by an organic material left in the pool. When there is too much of a mineral present in the water it can begin to stain the pool. As mentioned above in our experience most pools with yellow algae blooms also test positive for phosphates or nitrates in the water.

Whether it is inground or above ground our products are specifically formulated to identify and treat a variety of pool stains no matter the cause. Use a phosphate remover chemical. Gunite pools are overlaid with waterproof plaster. For best results add 1 quart per 10 000 gallons on a weekly basis and you will never have metal stains in your pool.