How to Identify and Remove Pool Stains

Pool stains are one of the most frustrating issues for pool owners across Australia. Whether you have a concrete pool, a pebblecrete finish, or a fibreglass surface, stains can appear out of nowhere and stubbornly stick to your pool floor and walls. In this comprehensive guide, we explain how to get rid of stains on pool floor surfaces, explore different stain types, and provide the most effective stain removal and prevention techniques to keep your pool water crystal clear.

Understanding the Types of Pool Stains

Pool stains generally fall into two main categories: organic stains and metal stains. Identifying the type of stain you are dealing with is essential for choosing the correct treatment and avoiding ineffective remedies that waste time and money.

Organic Pool Stains

Organic stains are the most common type found on pool surfaces and result from plant matter such as leaves, berries, algae, or twigs settling in the water or on the floor. Greenish brown stains often signal the presence of decomposed foliage, while reddish blue stains typically come from berries dropped by nearby trees.

You might also notice blueish greenish black stains, which could come from organic matter or indicate traces of copper from other sources.

Metal Pool Stains

Metal stains, on the other hand, often stem from corroded copper pipes, rusted metal accessories, or dissolved metals present in well water or bore water. Greenish brownish red stains suggest iron in your pool water, while brownish blackish purple stains indicate manganese, a metal that is commonly found in Australian well water. Metal particles introduced through pipes or fittings often lead to persistent and unsightly blemishes on your pool floor.

Stain Colour Guide

• Green and brown stains: Usually organic
• Red or blue stains: Often from berries
• Brown stains: Could be organic or metal related
• Blue stains: May signal copper presence
• Brownish blackish purple stains: Typically manganese
• Greenish brownish red stains: Suggest iron deposits

By observing stain colour and texture, and considering recent changes in your water source or pool surroundings, you can better understand how to remove pool stains effectively.

How to Remove Pool Stains

Once you have identified the stain type, the next step is pool stain removal. Stains caused by organic material and those caused by metals require different treatment methods and products.

Organic Stain Removal

Organic stains can usually be treated with basic sanitisation methods. Start by using a liquid test kit or home test kits to confirm that the stain is not metal based.

• Chlorine shock is often used to treat organic pool stains
• Shocking the pool breaks down the plant-based materials causing discolouration
• Brushing the pool floor and walls regularly helps dislodge stubborn stains
• Use your automatic pool cleaner or manually clean the surfaces to assist the process

If stains remain after treatment, repeat the shock process and scrub the area again. In most cases, organic stains fade significantly or disappear after 48 hours.

Metal Stain Removal

Metal stains are more challenging and require specific chemical treatments. Start by identifying the type of metal present. You can visit your local pool store or use a test kit designed for metal detection.

• Apply a metal pool stain remover that targets the specific metal, such as copper or iron
• Products vary, so follow the manufacturer’s instructions carefully
• Use a metal sequestrant to bind any remaining metal particles in the water and prevent re-staining
• Some stains may require that you pump overnight or run your pool filter continuously for 24 hours

For persistent stains, you may need to repeat the process multiple times. Be sure to keep your pool water balanced during treatment to maximise effectiveness and protect pool surfaces.

How to Prevent Future Stains

Preventing pool stains is far easier than removing them. With regular pool maintenance and a few preventative strategies, you can dramatically reduce the risk of discolouration on your pool floor.

Maintain Water Balance

Keeping your pool water balanced is your first line of defence. Test and adjust pH, total alkalinity, and sanitiser levels routinely.

• Low pH can corrode copper pipes, releasing metals into the water
• High pH can encourage metal precipitation, increasing the chance of metal pool stains

Clean the Pool Regularly

• Skim the pool regularly to remove leaves, twigs, and plant matter
• Run your automatic pool cleaner or vacuum manually to keep debris from settling
• Brush walls and floors weekly to remove early-stage stains before they become tough stains

Monitor Metal Sources

• Before filling or refilling your pool, test your water source for metals
• Use a hose filter to remove naturally occurring metal from well or bore water
• Inspect copper plumbing for corrosion and replace pipes as needed
• Install metal sequestrants to keep metals suspended and prevent them from settling on pool surfaces

Landscaping Considerations

• Avoid planting fruit-bearing trees or shrubs near the pool
• Rusted metal accessories like ladders or rails should be maintained or replaced
• Regularly inspect the pool area and respond to early signs of staining

Choosing the Right Pool Stain Removers

When looking for an effective pool stain remover, it’s important to match the product to the stain type.

• Metal pool stain removers are tailored for specific metals like copper, iron, and manganese
• Always follow product instructions as each brand may require a unique application method
• Use stain removers in conjunction with scrubbing to tackle remaining stains
• For organic and metal stains, comprehensive stain removal kits are available from your local pool store

Remember, some stains may appear again if the underlying cause is not addressed. Whether it’s poor water balance, corroded copper pipes, or falling organic matter, prevention is key.

Final Thoughts

Knowing how to identify and remove pool stains is essential for keeping your pool clean, safe, and looking its best. From recognising colour patterns on the pool floor to using targeted stain removers and preventative care, the right approach will save you both time and money. If you are unsure what type of stain you are dealing with, visit a local pool store or consult with the team at 1 Pool Care for tailored advice.

For tough stains that will not go away, or if you want a professional assessment, reach out to our expert pool technicians. We provide effective pool stain removal services to get your pool sparkling again.