I too have lost thousands since I started in the 50s, and the first thing I do everyday I enter the fishroom, is check for dead ones, and am surprised where there are none.
A bit off the main subject, but I think worth mentioning.
The trouble with most water softeners is they simply exchange the calcium ion for the sodium ion, which softens water for making suds (the real point of softening water for humans), but not same kind of soft water for a fish, it is actually slightly brackish (hardly the water Uaru fernandezyepizi or Apistos live in), one of the reasons it is not recommended humans to drink water from most softeners.
By the way Jon, I believe I ended up with your longinmanus from the box swap. excellent!
A bit off the main subject, but I think worth mentioning.
The trouble with most water softeners is they simply exchange the calcium ion for the sodium ion, which softens water for making suds (the real point of softening water for humans), but not same kind of soft water for a fish, it is actually slightly brackish (hardly the water Uaru fernandezyepizi or Apistos live in), one of the reasons it is not recommended humans to drink water from most softeners.
By the way Jon, I believe I ended up with your longinmanus from the box swap. excellent!
I think a lot of us have lost more fish than they remember. I know that I have lost quite a few, at first from rookie mistakes, then just trying to figure out what works well with the set ups that you have. Personally, I've lost way too many soft water species trying to get them to acclimate to my tap water which is pretty hard and alkaline. I am on a well and have a system wide water softener, but I think that it does something to the water that many fish just don't like. Eventually, I learned what fish work well in my water and that is what I now keep.
Don't get discouraged. Learn from your mistakes and keep going.