What are these brown spots in the gunite of my pool? Chad in Richmond has noticed brown spots on the bottom of his pool in the gunite. What causes them and how do you get rid of them. We went to our HomeShow Pro for Pools, Colt, at US Pool for help. https://media.blubrry.com/home_show_garden_pros_radio/p/homeshowradio.com/wp-content/uploads/2019/11/EE-USP-191122-Brown-Spots.mp3Podcast: Play in new windowMore HomeShow Videos:Can I re-cycle the gunite from my old pool?What's a better choice: a gunite or fiberglass pool?What can I do about black spots on my covered patio…Why hasn't balancing my AC system eliminated hot spots?What does it take to put in a swimming pool?