A while ago I posted here about being given 3 zebra danios as tank mates for a male Betta in a 10 gallon. In summary 3 zebras are not enough to keep them happy, 5 zebras are too many for the Betta. When I had 3, the smallest of the 3 was killed I believe by one of it's own. It was constantly being chased. But, the Betta was of no interest to them, they stayed clear of him and he seemed to enjoy them being there. I added 3 more to make it 5 which calmed them right down. However, 2 of the new ones are very agressive and attacked the Betta daily during feeding, no matter how many tricks I tried to keep them apart, they'd figure it out. My Betta was spending most of his time in his log the last week and hardly swimming around. I was advised on here initially to return the 3 zebras, but they wouldn't accept them back, so I tried to make it work. My Betta through all this was pretty chill. He seemed fine with the little freaks and would swim right up to wherever they were and hang out. It cured his fin nipping (my reason for adding tank mates to begin with) and had I been given better advice and different tank mates all would be well. Fast forward to today - I had to move him to his former 5 gallon home yesterday after witnessing 2 danios attacking him during feeding. This morning I woke up to a lovely big bubble nest in his new/old home. I'm sad he's not in his 10g, home but he's not .