Board Thread:Questions and Answers/@comment-108.52.49.251-20131103022648/@comment-13413401-20131103132604

Well, the breeded probably isn't the problem, since it does not produce mob essence. Only the mob grinder makes mob essence. So make sure the grinder (or any pipes that carry mob essence) are not touching the sewers.

If your still having problems, could you upload a few screenshots of your setup?