Although we have a pond I'm new to tropicals, I set the tank up ,waited then bought 5 silver tips,on saturday I bought 3 balloon mollies,1 male 2 female so the guy said,one of the mollies is really fat ,sadly one died,but the other 2 or ok,if fat molly is pregnant,is there any way of telling when she will have them,I'd like to save a few if possible.