So I went to the orthodontist about a month ago and they changed their fish tank a lot. I think it's a 40g or 29g. They had some red zebra cichlids in there, but now they have a bunch of guppies ad platies. Males and females of each kind.it was seriously overstocked. I think there was at least a hundred. I didn't see any pregnant ones yet though. When I went a few days ago, there were about a fifth as many fish in there, and all the females were pregnant. So I think they didn't take care of the cichlids over the holidays, and they died, and sat for at least a week, causing the tank to lose its cycle. Then they decided to just get more fish, so they did. Now they have a fish factory.