phillydog1958;3655106; said:sorry to hear . . . i have a question, since my arowana is about the same size as your's was. you said you had the tank well secured and you don't know how he got out. was the cover ajar in anyway, when you found him? based on the evidence, can you speculate how he managed to get out of the tank? I worry about mine attempting to jump. he's getting bigger and stronger everyday. i have a good lid, but the rear of my lid has the typical plastic piece with cut outs for hoses, heaters, etc . . .