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; 3 white cloud minnows, several RCS, 2 blue shrimp, 5 Amano shrimp, several snails; AC50, Azoo air. 65 gal: planted; 7 rosy barbs, 2 glofish,, 1 zebra danio, 1 rosy red (fathead) minnow, 2 dojo loaches, several snails; AC110 x 2.