Not sure what is going on here but I have lost a UD Catfish yesterday evening and a Bronze Cory was dead in the tank this morning. Both fish looked healthy enough but did act strangely now that I think with hindsight. The UD Catfsh was swimming around the surface a couple of hours prior to its death, usually, it is rarely seen away from the side of a piece of bogwood. The Cory was perched very still on top of a piece of rock yesterday for long periods.
I tested the water last night after the UD had died and the parameters were all normal (Ammonia = 0ppt, Nitrite = 0ppt, Nitrate = 80ppt, which resulted in a 10% water change). The only change was the implementation of another filter to the tank in additional to the existing cannister filter as I intend to filter peat. The "new" filter has semi-new bio media but I didn't think that would be a problem as the bio-media in the existing filter is old and that would seed the new?
All other fish seem fine and I have more delicate species like Rams in there. The two that died have been in the tank for around 2-3 years but I don't imagine that their lifespans are so short??
Ideas are appreciated.
I tested the water last night after the UD had died and the parameters were all normal (Ammonia = 0ppt, Nitrite = 0ppt, Nitrate = 80ppt, which resulted in a 10% water change). The only change was the implementation of another filter to the tank in additional to the existing cannister filter as I intend to filter peat. The "new" filter has semi-new bio media but I didn't think that would be a problem as the bio-media in the existing filter is old and that would seed the new?
All other fish seem fine and I have more delicate species like Rams in there. The two that died have been in the tank for around 2-3 years but I don't imagine that their lifespans are so short??
Ideas are appreciated.
