Originally Posted by timbo2
One more note, if your profile is up to date, your tank is over stocked.. this could be the problem....
I completely agree with this. Even though you have had some basic success, a few month is nothing compared to how long you should be able to care for these animals. This might just be the first "hick-up", but I suspect you will have many more to come. Two large growing fish in a 55 gal
is very ill advised and you should really re-consider it. Not to mention conspecies will not tollerate each other for long in a small space as they mature.