Wow! Thanks ladies & gents for the comments!!! I really appreciate the help everyone has offered.
The vase looks like it holds approx the size of a 2 liter bottle of soda (maybe lightly less). When the owner brought the fish to my home I immediately told them that square plastic tank is not big enough!!! I will certainly stress again to the owner to get a larger bowl or better yet a 2 gallon tank; in fact I said I would purchase one but I do not think the owner would reimburse me so the vase is doing fine for now. The fish seems to enjoy it!
I would like to keep the little guy, as I have grown attached to him.
How one becomes attached to a fish, I'm trying to figure out.
I'm happy to hear I do not have to let the tap water sit for days if I am using the water conditioner; my counter top and husband will be happy the bowls will be removed.