Need help keeping new fish alive.

[GreenSpottedPuffer]

Originally Posted by hummer

My Ammonia readings have never changed. I always get 0.05. I'm going to go pick up a new test kit to see if there is a big difference. Should I get a new nitrate/nitrite kit as well? Or do those matter at this point? But I agree that it shouldn't affect only new fish. I don't notice any stress in any of the fish. Only the Rabbitfish occasionally spike its fins up but there's no one around him that is bothering him. I figured it was a reaction from me watching him. I did notice the rabbitfish stopped eating the day before he died. Could his death cause a water imbalance that the sailfin couldn't cope with? The skimmer has been going crazy last night after they died. I'll retest the system after I do a water change. I also do my water changes every 3-4 weeks. Should I do more frequent changes? I change out about 10-15%.

Strange...

The rabbitfish putting his spikes up when you watch him is normal--mine still does that to me sometimes and I have had him for years. It is a defense mechanism but shouldn't mean he is really stressed, especially to the point that he would just die.

Yes the rabbit dieing could cause water issues that effect the Sailfin but it really would have effected all the fish. I guess with the Sailfin being newer though maybe he got more stressed. Still doesn't make any sense to me though.

Your tank is ready for fish (established long enough), you have fish that have been with you for 3 years (you know what your doing) and the new fish last a month and then suddenly die (all from different stores though)...really strange.

Were the rabbit and sailfin from the same store though? Bought at the same time? I can't remember.