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[Christine1014]

The nitrite is definitely a big problem, and likely what's killed your fish.
How long has the tank been set up, what kind of cycling did you do, and how long did it take?

Baring no issues with cycling, my guess is that adding the feeders (and then having them die and get ripped apart in the tank) put your tank into a mini-cycle. You probably also had a brief ammonia spike, which caused the first of the fish deaths. Now your nitrifying bacteria are struggling to keep up with the bioload. Since that load's been diminished and your extra ammonia processed, things should return to normal soon, but I'd put an end to the live food. Or at the very least, keep it to one at a time, cleaning the tank really well after the fish have had their feast.

 

[ArauraDiscus]

Nitrite coulld definately be the problem. Nitrite is like carbon monoxide to humans. It binds with the blood cells making them stable, which then makes them useless for carrying oxygen. This causes fish to breath heavy but it's not because of a lack of oxygen, they are just slowly sufficating.

 

[Fishboy1981]

Thanks for all your advice guys but my cat fish has now passed away. I am in florida and no flooding has been occuring here, but there has been a great deal of rain maybe something different is in the water. The tank is 2 years old and the nitrite test has the lowest lvl as 0.1 so I dont know how this could have been a factor that is the lowest reading for the test it cant measure anything lower .1 is practically 0 to the test. The two guys are gone now so speculation it just useless at this point

The nitrite is definitely a big problem, and likely what's killed your fish.
How long has the tank been set up, what kind of cycling did you do, and how long did it take?

Baring no issues with cycling, my guess is that adding the feeders (and then having them die and get ripped apart in the tank) put your tank into a mini-cycle. You probably also had a brief ammonia spike, which caused the first of the fish deaths. Now your nitrifying bacteria are struggling to keep up with the bioload. Since that load's been diminished and your extra ammonia processed, things should return to normal soon, but I'd put an end to the live food. Or at the very least, keep it to one at a time, cleaning the tank really well after the fish have had their feast.

Thanks for all your advice guys but my cat fish has now passed away. I am in florida and no flooding has been occuring here, but there has been a great deal of rain maybe something different is in the water. The nitrite test has the lowest lvl as 0.1 so I dont know how this could have been a factor that is the lowest reading for the test it cant measure anything lower .1 is practically 0 to the test. The two guys are gone now so speculation it just useless at this point

 

[WILDER]

Sorry Bless them R.I.P.