That's it really, not looking for advice or telling off... I know I've did a stupid thing and have to get it off my chest.
I've had the fish for around 9 months. We had 9, then a jumper who died and last week a death by natural causes. So the number was down to 7
I changed the tank today and I'm always so very careful no fish swim into the bowl I use to get old water out. It wasn't until I was putting the dirty water down the sink, that I saw my Zebra Danio going with it! It was too late by the time I saw it. Feel so awful. What a slow painful death my lovely, lively wee Zebra will have
If only I had at least emptied the water down the toilet. I could have got it out then. I'll have to tell my 5 year old that another fish has died.