In a word ~ NO. If the algae bloom is that severe maybe a replaster is in order. Sounds like you need to be more diligent on chemistry in the pool along with proper filtration among other things. Sounds like a problem of neglect. Black algae will bore into the plaster unlike green algae. It is very difficult to get rid of especially on rough plaster. You cannot cover over it or paint over it. Oh, the dark blue liner or any liner can and will cover and hide the algae problem but you will still have the algae problem and in fact compound the problem. The algae could bore through the new liner and then where will you be - - right back in the same boat. k
The wrinkles are there to provide for liner shrinkage over the years.
We lived in Miami for 33 years and never found an answer. We considered croton stains to be permanent and never wore clothes we cared about when cutting crotons.
Years ago there was a product called "Blue Away" I used it on my BSA and worked ok
Cruse liner? Don't know. Cruise liner? Two to three years.
For years we've foudn that if you srpau windex directly on the area and soak it back out it works best
The reality is that the average inground pool liner will last 8-12 years.
Yes, try Resolve sofa cleaner. They used to just make rug cleaner, but they have expanded in the last few years. When it's clean, use ScotchGuard to protect against new stains.
put a can of coke in when you wash the acid in the coke will take it out most of the time. Been doing it for years!
I liner can last from 3-10 years or more. The lifespan is 7 years on average. The variation is due to wear and tear, chlorine levels, sun exposure, abrasion and other activities that wear down the liner.
There are many mixtures that will remove stains as well as name brand products. You tube even offer videos of carpet cleaning. If all else fails call a professional service.