I know it is silly for some, but I grieving over the fact that my danio just died. This morning I saw him I thought it was a little piece of driftwood that fell and then I looked a little closer and it was one of them. I had 5, but now I am down to 4. I don't even know how he got out... The lid wasn't on fully and I regret that so much because he wouldn't have gotten out. I just don't know what to do with the rest of the 4 danios. Do I get another one?