does one want these worms in the subtrate?![]()
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I've had colonies of blackworms do that in the bottom of an old 10-gallong tropical freswater I used to keep. I introduce some Kuhli Loaches ( http://www.loaches.com/species-index/pangio-kuhlii ) and the "problem" was solved.
Now, looking at this thread, I may have found an answer to my own worm ID thread... though I never fed my fish tubifex worms...
see: http://www.aquariacentral.com/forums/showthread.php?t=129617