Tank fix

fbird

New member
I recently found a used 45 gallon oceanic tech series tank for a great deal. The only problem is the guy who had it before drilled a hole in the back of the tank for a second return line. I really would like to block this off as the way he made it there is no way to prevent the return from siphoning water out of the tank if the power goes out.

Its basically got a hole about 1 1/2" across. Would any of you have any suggestions for repairing this? I haven't purchased the tank yet but would very much like to so I can replace my current 25 gallon set up. Thanks in advance.
 
This may sound like a stupid question but where can I buy something like that? is that going to look ok in the back of the tank? Thanks for the reply.
 
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