I own two zebra danios and they are currently housed in a fish bowl approximately 1 gallon. I know this is awful because of ammonia spikes however I clean it every other day. Please do not comment me to get a new tank because I am saving up for that and can't buy it yet. I'm not completely sure on their gender but I guessed. My two zebra danios are getting fat. The first danio I thought was pregnant but it hasn't laid eggs for the past around 3-4 months she has been fat for a little longer than that. The other one I thought was a male but is also almost the same size as the so I thought pregnant one. They eat and swim fine so I don't think it's a internal parasite. It's not dropsy because their scales aren't poking out like a pine cone at all. I don't think it's swim bladder because like I said they swim fine. I'm really worried and was wondering why they are getting so fat. I don't think it's constipation or over feeding either because I see poop every time I clean the bowl and I'm careful not to over feed. This is urgent. What can I do in the mean time until I get a new tank? P.s I would post a photo of them, but I'm not sure how yet as I just joined this forum.