Hi, I am experiencing strange behavior from one of my female guppies. I have never had this problem or situation before and I am completely stumped. I have a female guppy who gave birth to a good amount of fry on June 3rd, but she never got any smaller and her gravid spot remained dark. A week later she had more babies, a lot more. Her gravid spot turned red (she is a very light yellow color) and she was a little smaller. But I noticed this morning that once again she is huge, her gravid spot is black and she looks like she is about to pop. (It hasn't even been a week since she gave birth again..) All morning she has been hovering around the top of the tank not moving much. She is avoiding the others as well. She doesn't look like she is dying, just very inactive. Anyone ever had this problem before and know what's going on with her? Tank info: 20 Gallon Occupants: 4 female guppies, 1 male guppy, 3 snails, 1 Corydora, a few ghost shrimp, and a bunch of fry. Live Plants Sand Substrate Temp: 81 degrees F Carbon filter My ph levels are fine, my nitrate levels are a little high though and I'm going to do a 10% water change today. Done a 25% water change 2 days ago. Note: All my other guppies seem to be doing fine. Another female gave birth just fine and slimmed up. No fin rot, no other kind of diseases and my fry are doing very well.