Also, thanks for the eel regards. He was my favorite animal in my tank, even though he was an butt and knocked things over on accident from time to time. I'm heading to the store to buy another one.
Another side comment, I'm not dosing anything into the tank, is this something I should look into? I have a raspberry-pi monitoring Ph, temp, etc. and am looking into peristaltic pumps to handle dosing, but am currently not doing any of it. End goal for the tank is a reef/fish tank.
Just a side note here. I would wait at least 14 days after losing a fish to unknown reasons before adding another, especially the same species. 30 days would be better.
I saw a lot of discussion about water quality - but aren't your other fish unaffected? Almost all finned fishes are going to be just as or even more sensitive to water quality issues that a snowflake would be.
Jay