IHAVEADANE;94496 wrote: Just came come to find my tank had a complete meltdown. Only thing alive are the fish. Water parameters look good, temp OK... I am at a loss.
Just did a water change about 2 weeks ago so I do not have any water ready. How long to "mix" the water until it is ready to use?
I have used fast-mixed water many times. As others said, it is probably less of a problem than other options.
Some possibilities to look for on what happened (some repetitive, most you probably know, but...):
-Electrical short. A heater kick in for the first time in a while, by chance? Something else on a timer?
-Ammonia spike
-Dead fish or other animal (really an ammonia spike). One dead animal can lead to a cascade.
-Chemical contamination. Something fall in the tank? (I found a carpet knife in my sump at least 3 months after I must have dropped it in there).
-You indicate your parameters are OK, but not what they are. Alk and Nitrite are of interest in these situations. Also, let us know how you measure them. I have been lulled into complacency by test kits that expired slowly over time, and probes (PH, conductivity) that went drifted out. Also, how big is the tank... etc.
-Sulfate (sulfite?) spike from stirring things up/moving things around?
Low oxygen and electrical short are lower probability with the fish surviving, but this could be a combination of things.
Sorry you had this happen!
-Mike