So I decided to upgrade my main return pump to an DC 12000. In doing so I redid my plumbing. Since my filter is in the basement and my tank is upstairs it was quite a project.

Anyway, so I removed the old pipes which is about 12 years old. Holy &@$? imagine my surprise! Look at the inside of my pipes. I know public aquariums shoot an inflatable stopper through their pipes now I know why.

ahyja5ug - Anyone ever check their pipes?