I dont know if it was their age that led
to their demise. The temp was 78 the whole time. Their ages were 13 (yellow tang), 10 (yellow eyed kole tang) and 8 (Scopas tang). I believe tangs need plenty of aeration though. I also lost a 13 yr old damsel and a sixline. I have a generator on the way so next time I`ll start it up right away. You only as I said earlier have hours.