We all make mistakes.
Look at it this way: You now have knowledge and experience you didn't previously have. Your surviving stock as well as future stock will benefit as a result.
And so will you.
Your sharing this will benefit others on this board.
You've done a lot of good, here.
20 gal. high: planted; 1 zebra danio, 6 glofish, several snails, 2 (visible) RCS; AC50, Azoo air. 65 gal: planted; 4 rosy barbs, 6 glofish, 5 white cloud minnows, 3 zebra danios, 5 dojo loaches, several snails; AC110 x 2.