I opened my pool Sunday. When I went to take the last cap off of the 3rd return in my pool I found that my pool company had left the eye in that return. I live in Northern Illinois and it does freeze here. Now, I only have 1 working return (and it's not the one that the eye was left on). I'm not sure if the two of these things could be related. I'm worried I have a (or two) cracked pipe(s). Anyone ever have the same issue? Any suggestions are greatly appreciated.