I feel for you. It's hard to lose a favorite fish, especially if you feel at fault. I once had a tiretrack eel find his way into the hob
filter, and from there to the floor. Unfortunately, the cat found him before I did. . .
3g betta, 29g molly, 90g Amer cichlid, 90g community, 137g African cichlid, 220g water garden, 6,500g koi pond