I HAVE AN ABOVE GROUND 15 x 30 AND DESPITE MY CHEMISTRY BEING IN BALANCE(PER A CHEMICAL STRIP) I HAVE A YELLOW/“ORANGEISH” STAIN IN SEVERAL PLACES ON MY LINER.
I HAVE TRIED “METAL OUT” AND OTHER CHELATORS TO HOPEFULLY DISSOLVE IF A METALLIC PPT.
IF YOUR EXPERTS HAVE ANY OTHER SUGGESTIONS TO TRY I WOULD APPRECIATE YOUR HELP.
THANK YOU.