Hi again We have only been keeping fish for a few months, and now have 120 fish in 8 tanks. Nearly all looking lovely and healthy, weekly 50 % water changes and frequent testing with liquid drops. One tank, however is a mystery and nobody in the 4 Lfs we frequent can answer. At first we had a few guppies, platies, swordtails and 2 cory Doras. Current stock is 2 guppies, 2 platies, 2 swordtails and the 2 cories. I have removed some to other tanks and we lost a few early on. All the females have massively bloated abdomens. Of course I just assumed they were pregnant but it's been months and no change and no fry. Some are square shaped like they are about to drop. The males and cories are all unaffected. The fish have no other symptoms whatsoever, surely if it was dropsy they wouldn't still be alive ? Can anyone shed any light?