unfortunantly on sun when i did water change and filte cleaning. i wasn't carfull enogh with the quilt batting.as i pulled it out of the sump. abunch of the fine particals dumped back into the sump.since i dont turn the pump off it pumoed all this fine dust back into the tank.and im sure this is what killed 2 of my fish. i dont really think this will have a big impact on the breeding since there are still 12 fish in this tank.you guy should check out my going to minneapolis thread. leaving my hotel now for the 3d day of fish shopping. found some sweet pirahnas. if i really wanted to get them i could but am telling myself my tanks are full.i am picking up some fire shrip off craigs list tomorrow though. and maybe hitting the como zoo