I purchased 3 mollies around 4 months ago, all 3 pregnant females, first one gave birth, no problems, second, then third, all offspring from the female mollies are doing wonderful, all are female (which is a good thing).
Our tank is 125 gallons, complete with live plants, we keep the temp at a nice 81 degrees for all fish, Pleco's, chinese algae eaters and the mollies, PH I am a little worried about because it is between 7.5 - 7.8 which I would like it a tiny bit lower, however all fish seem to not have any problems.
However, I have a black dalmation molly that is on her second batch of babies, however it has been around a month, month and a half since she started showing, her stomach has puffed to about 2x larger then when I purchased her when she was pregnant with her first batch, we have no males in the tank, and I have read and from past experience with mollies that they can go without breeding up to 6 months and still have offspring every month or so, however, my first molly I had purchased became pregnant again, without a male, she was 4x larger and didn't end up having any babies second time around, and ended up dying around a month ago, sadly I miss her, however I know that she didn't have any diseases at the time that could have caused her to appear pregnant, and not be, at the beginning when we purchased the mollies another molly had brought Ich to the tank, after a two month battle with it, we are ich free.
I am wondering should I purchase a male to be sure that my molly that appears to be pregnant actually has fertilized eggs? I don't want to end up losing her, she deffinetly appears pregnant, and her eating over the past few weeks has tripled, as did my other molly that wasn't able to birth her fry before she died.
Can a molly have a full batch of unfertilized eggs and it cause her to die due to the fact that she is unable to give birth?
I am a bit worried about my dalmation since it has been a little over a month and still no babies, she hasn't had any contact with a male since I purchased her, tips and advice would be helpful.