First post of the year and I would like to say that the great advice I received from here last year for our pool closing proved to do the trick so a big, much deserved "thank you" to everyone here. Now to the current problem. I have a gunite inground pool with about 17,000 gallons of water. We opened it fine and just had the water tested and everything is satisfactory. The only rare problem this year is that we are receiving a ton of rain this summer in CT. We also have a leafy tree whose branches stretch out over our pool. We have been getting brown stains on the bottom of our pool in the shallow end and on the sides. I have tried using vitamin C to remove the stains, black algae remover, algae remover, and granulated shock with no success. Here are three pics:
Thank you for taking the time to look.