How To Remove The Scum Line From Your Swimming Pool


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There's no worse feeling than looking at your swimming pool and seeing the infamous "scum line" around the pool. The scum line is caused by a build up of organic waste that clings to the pool wall. Below are a few steps that will help you get rid of it.

Step by Step


Step 1

First thing to do is make sure that the water level is at or slightly below the waterline ring. Lowering the waterline slightly may yield better results.

Step 2

Begin by spraying the Clean & Perfect directly on to the scum line. Let it sit for 3-5 minutes before scrubbing.

Step 3

Once at least 3 minutes have passed, you can begin scrubbing the scum line. If it is not coming off easily, you can re-apply the Clean & Perfect and use warm water when scrubbing.

Step 4

If you do not get the desired results, repeat steps 2 and 3 until the water line ring has been completely removed.

Step 5

Once you've successfully removed the scum line, raise the water level (if you lowered it) and enjoy your swimming pool. You can use either Pool Perfect or Pool First Aid as part of your weekly maintenance to prevent the scum line from returning.


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Matthew  Posted: 08/07/2018 12:34 PM  Latest

Yes, these techniques can be used on fiberglass pool steps.

LONNIE G RAY  Posted: 06/25/2018 16:18 PM 

Will this work cleaning white fiberglass steps?

Inyopools  Posted: 05/11/2018 15:11 PM  Inyo Product Specialist

Hello Tina - Yes, this can be used in a salt water pool.

Tina  Posted: 05/10/2018 21:45 PM 

Can this be used in saltwater pools?

Inyopools  Posted: 09/04/2017 11:09 AM  Inyo Product Specialist

Clayton - I wouldn't think so. Any cleaner we have recommended is stronger than the Magic Erasers. And anything it might add to the pool water would be diluted by the large volume of water just like the strong acid that's added.

Clayton  Posted: 09/01/2017 13:03 PM 

Does Magic Eraser cause any harm to the pool water?

Anonymous  Posted: 03/25/2017 8:27 AM 

i use magic eraser on my fibre glass pool no problem

brightstar0305  Posted: 03/25/2017 8:26 AM 

I have found that a magic eraser works very well in removing all ring lines both metal and scum

Anonymous  Posted: 01/17/2017 1:17 AM 

Can this product be used successfully on fiberglass pools?

Anonymous  Posted: 07/20/2015 23:48 PM 

Are these products safe for a fibreglass pool