Thanks guys. The 2nd sick fish died today. None of the other fish show any physical symtoms. Does'nt mean they may not get infected thou i guess. I've had those 2 fish for 4-6 months i believe.
Are you properly informed on the water condition for those fish being a hard water fish?
Basically like light brackish water.
Check on this if you don't know much about it.
If this is fine then definatelly make sure you keep your filters in proper order. It is highly possible this is all due to your dirty filter harboring harmful bacteria.
