I have uploaded a picture of the problem I have. The problem looks like it may be green but the brush will not touch it.
This problem showed up (picture included) when I opened the pool this last week end. I use a mesh cover and all looked well except for some trash that builds in the corners of the the vinyl pool at the deep end. I cleaned the material over this area and scrubbed hard...No luck. I have shocked...No luck. I have this problem is several areas of the deep end that had trash laying in the corners over the areas that this is showing up.
I have had the pool for 22 years and just replaced the liner last spring. I have NEVER seen a problem like this before. I always start the filter early with the cover on and start treating it so I NEVER have a green pool.....Just run the pool cleaner 2 or three times, after the cover comes off, and the pool has always always looks great.
I have no idea what I am dealing with...Any and ALL help would be greatly appreciated.
VA Beach, VA