Sorry to hear this. I've had my peacock/hap tank in place for about 9 months now, and while I haven't lost one yet, in the back of my mind I get up every morning wondering if today is the day I'll have the same experience you just had. I think it's okay to be upset and let that emotion run its course, but hopefully you still get enough enjoyment out of keeping these fish to keep moving forward. Your remaining fish still rely on you to have a great life in their big glass box, so take what you can from this experience and grow from it.

702Cichlid's advice is as usual on point and is reassuring to me... now I have a better idea what to expect when that dreaded day comes for me. :-/