im quite new to tropical fish and believe 2 of my plattys are pregnant. i have 3 female sunset plattys and 1 male orange platty. two of my females have had a gravid spot for around 3 weeks but have not got any fatter and the third had no gravid spot but is very fat and hides behind the filter. im a bit confused about them all. any one have any ideas whats goin on??