Hi all. recently Ive noticed my mollies are really big. They seem very large for a couple days, then go back to smaller. Right now, one is large and one is smaller.. but 2 days ago.. they were both the same size. What the heck is going on? I had 3. 3 days ago i lost one. Is something happening to them? Other than that, the remaining two look healthy... they just seem to expand and then go back to small again. Am I losing my mind? Or what?!?