The 25 tall. has 1- 1" bulk head near the top on the side. Did you drill these yourself? If so is it possible to add another bulkhead to the top back? I want to set up a small tank that I can plump to my larger tank. I will let gravity work as the drain and a pump in the sump of my larger tank sending the water back. If it is possible I will buy one from you.
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