Actually since the death there has been an issue with the whole tank... I do daily water param checks and have never had an issue... all of a sudden Amonia went off the charts, Nitrates and Nitrites are both off the charts as well... I've done 4 50% water changes per day and still can't get them to stay down for more than a few hours. It's really starting to bother me actually....I'm spending more time on this one tank than all the others (11) combined. It's not a filter crash as I wouldn't be seeing the Nitrates growing like this. I've searched the tank for something rotting but it's a bare bottom tank... there is only so many places it could be and I havn't found it. Checked the filters... both are doing fine and aren't in need of any cleaning as they have both be done within the past 3 days. I can't figure this out...