I am helping a buddy of mine open his 8000 gallon pool. We are noticing some extensive staining on the bottom and walls of the pool. Please see the attached picture. The pool is suppose to have the blue look to it and not the reddish dirty look.
Any thoughts or suggestions on removing.
Alk - 60
Cal - not tested yet
Cya - 40
Fc - 20(just shocked again)