I am so sorry to read this. RIP BO.

You know, you did your best at this time, and that COUNTS. We can ALWAYS do more, no matter what the issue (pet care, self care, plant care, studying for an exam - you didn't HAVE to wait until 1 AM!). Sometimes, it just isn't enough.

Also, you don't know much about ththis sort of pet yet, perhaps he was ill or had some health issue. That is possible. I went through this when I lost my
Tony - pup, it is very very hard. Sure I could have done more, and I knew better. But things happen, and they happen for a reason. Bo was not meant to have the 20 year life span, we don't know why and we may never know why.

Bo had a great time with you, and his guppy friend. He was eating and as you say, he was shedding well. THAT COUNTS.

I am sorry for your loss.