Hello, Everyone.
Thank you all that helped me 2 years ago with a Black Algae identification mystery in my pool. Someone towards the end of the conversation mentioned calcium, and that is currently what the head of the pool company is saying when he came out to see the pool. He said that we had three problems...the pool was closed for several years and not treated (I know now, but didn't then), so the chemistry was off and the pool was a mess, so dirt accumulated and calcium covered it, and it cannot be cleaned in a realistic way. It covers a lot of the pool, and he is suggested it could cost a fair amount to acid wash it, perhaps damage the plaster, and still have to be replanted soon anyway. The second problem is that gunite is beginning to show through in a few places, and the third is that weird worm shapes are also present in several places in the plaster. I forgot what caused these. He said that it really needs a replaster to fix it all, but it's currently safe to swim in and the black spots on the floor and walls of the pool are not Black Algae. The black dots (many, many of them) have sharp edges, can barely be scraped off, do not smear green or any other color, and when finally scraped off the pool floor or sides, is tan in color and hard, and sharp. It does not fizz when covered with vinegar. It is not sticky or tar like. It does not smear.
This pool company has been servicing this pool since the 70's, and the owner the second generation to own the company and work on the pool. It is also a Caribbean Clear pool and he and several of you suggested that is also causing some of the staining.
Before I let my immune compromised daughter swim in the pool, I just wanted to run all of this by ya'll and get your opinion on it. Does this explanation make sense to ya'll? Pictures of the pool are on the former thread. I'll try and attach more here.
Thank you!
Thank you all that helped me 2 years ago with a Black Algae identification mystery in my pool. Someone towards the end of the conversation mentioned calcium, and that is currently what the head of the pool company is saying when he came out to see the pool. He said that we had three problems...the pool was closed for several years and not treated (I know now, but didn't then), so the chemistry was off and the pool was a mess, so dirt accumulated and calcium covered it, and it cannot be cleaned in a realistic way. It covers a lot of the pool, and he is suggested it could cost a fair amount to acid wash it, perhaps damage the plaster, and still have to be replanted soon anyway. The second problem is that gunite is beginning to show through in a few places, and the third is that weird worm shapes are also present in several places in the plaster. I forgot what caused these. He said that it really needs a replaster to fix it all, but it's currently safe to swim in and the black spots on the floor and walls of the pool are not Black Algae. The black dots (many, many of them) have sharp edges, can barely be scraped off, do not smear green or any other color, and when finally scraped off the pool floor or sides, is tan in color and hard, and sharp. It does not fizz when covered with vinegar. It is not sticky or tar like. It does not smear.
This pool company has been servicing this pool since the 70's, and the owner the second generation to own the company and work on the pool. It is also a Caribbean Clear pool and he and several of you suggested that is also causing some of the staining.
Before I let my immune compromised daughter swim in the pool, I just wanted to run all of this by ya'll and get your opinion on it. Does this explanation make sense to ya'll? Pictures of the pool are on the former thread. I'll try and attach more here.
Thank you!
