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I've tried rubbing a vitamin C tablet on some spots and didn't notice any change in their size or colour. I actually have about 100 spots, the picture I've put up is just in one small area. I bought some liquid 'stain and scale away'. 2L of it. I dumped 2L of it in one corner of the pool where...

When I got home I realized I didn't have any vitamin C tablets to work with and I neglected to cut open a lime and try it out, but I did take some pictures and jumped in the pool to have a feel around. The spots are not slimey aren't really 'bumpy' either. I've attached pictures. I went to my...

Hi I am a new pool owner, (the pool isn't new, but I'm new too it...) and this is my first post. I have some round yellowish spots multiplying in the shallow end of my pool, in an area that gets continual sun during the day, where the vertical pool wall meets the bottom of the pool. The pool...