100litre tank, undergravel filter, estimated 30-40 guppies, 4 angels, 4 gouramis, 3 ghost catfish, 8 neon tetras, 6 head and tail light tetra, 6 silvertip tetras, 2 cory. I have a few pregnant guppies, but this one is really big and looks like she should have given birth a long time ago. She was in a much smaller tank amongst almost double the amount of guppies - half of those guppies were given to me and her new home (my tank) she's been in for over two weeks. Lots of hiding places, no fish seem to be bothering her.. Last water change was Sunday (24/07) Sorry, couldn't really think of a better word - doesn't even look normal she's so big!