Your signature is light on details. Can you fill it out better with type of pool - plaster, vinyl, or fiberglass - and models of equipment. Knowing the details of your pool effect the recommendations.
What test kit do you have? What is your water chemistry?
What chemicals have you tried on the brown buildup?
Let's get an understanding of your water chemistry and follow our stain identification process.
The stained pool is beyond embarrassing. Our in-depth Guide to remove stains in your pool will help you to remove the stains and prevent them in the future.
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Calcium buildup is usually white, not brown.
Post some pics of the stain areas.