Wow... Both of em died? Thats f'ed. They say that aro's have the power to protect you from bad luck and harm. The thing is that they protect you from the bad luck/harm by sacrificing themselves... Maybe your aro's were protecting you (from a car accident or something like that?). I have had an experience similar to yours where one of my beloved aro's decided to "commit suicide". It started to freak out out of no where and bang its head into the glass until it was knocked out/paralized and died. Never figured out why it did that... Water parameters were perfect, it was healthy and eating, and never freaked out before. I could bang the glass all I wanted, dance around it, play peek-a-boo, and all it would do was look at me and wait for food. He had no tankmates and nothing was different/out of the ordinary for a while. My dad was on a trip though and he loved that aro as much as I did (he was pissed when he came home). Maybe it was protecting him? Or maybe it was bored to death... I don't believe fish commit suicide though... I'm sure it wasn't a lifespan problem with your leis as I had a lei for 6 maybe 7 years before the stupid thing jumped out of the tank (knocked off a heavy 8 foot piece of 2 by 4 while opening the cover to jump out) and hit the ground so hard it was f'ed and died. Seriously though I would call your water supply company and see if they made any changes or ask for a report. Again sorry for your loss... It must hurt.