hi Cesr,
perhaps you could share with us some extra info.
how big was your micro when it died?
how many micro u had in the tanks at one time?
how big is the tanks?
and the only caused of death that i could think of rite now is ,maybe the feeder fish u feed him,if im not mistaken the climbing perch is "puyu" rite????
if it is, then it might be the caused, its a damn tough fish too and its not easy for your giant to swollow...dorsal and pelvic fins are as tough as metal....
i could be wrong anyway....
so what u can do for a start is that u can try feed the next micro goldfish or seluang instead..
apart of that, seldom i hear that micro/giant just died like that....u are rite, they are very tough fish.
sorry for your lost bro...and keep us update ya..
cheers
keep us update ya...