Got this pool cleaned up and was wondering what the white things are on the bottom. We did notice that they do have water come out of them due to trying to figure out the valves on this pool we just moved into. Also, you can see that we got it real clean, but there are stains all over. How do we address it? I saw the post about the vitamin C, but this is massive amount of staining. This was taken right after we got it decently clear but now it is crystal, and so awesome!
Believe it to be concrete mix. (have not done research to actually determine what it is.)