We had a slight problem when we opened the pool this year; although the water itself was spotless, part of the bottom was covered in a green algae that was 'welded' to the liner, unlike the usual algae this stuff wouldn't brush off. We're used to most ills, but not this!
We consulted experts, we consulted the web, and we desperately tried altering the chemical balance. Nothing seemed to work.
Then Lady Magnon read somewhere that Vitamin C (yes, Vitamin C) might do the job, so she started throwing her entire stock of Vitamin C tablets into the pool; and, hey presto, it worked.
So I went direct to Amazon and ordered some Vitamin C (ascorbic acid) powder, which arrived a couple of days ago.
I sprinkled it liberally around, and now the sides and bottom are back to their perfectly clean state.
With all that Vitamin C in the water, we should never be ill again. Amazing the solutions one comes across..... who would have thought that Vitamin C could be used as a pool cleaner!!!