Lost my 2 best fish this week. Im not totally sure wtf happened but im thinking they got an internal parasite. I introduced a new pleco about 2 months ago, and shortly after got an infestation of lice. Got that all cleared up, but since then those 2 fish had been acting a little strange. More or less normal except they were less interested in food. Still eating, just not as vigorously as they used to. Woke up to my stud Orino dead a few days back, and this morning my awesome Peru mono was laying on his side barely breathing. Was fine last night. Ive had these guys since they were 3". They were 14" at the end. Im gutted to say the least. 
R.I.P

R.I.P