Hello everyone, this is my first post 
I've just started keeping mollies. I bought 2 males and 3 females, reasoning that having more females than males would be a good idea.
They were pretty small when I bought them, but having kept platies I was totally confident that the shop assistant had sexed them correctly when I took a look at the anal fins.
However, I've been on holiday for a week and come back to find what appears to be 4 males chasing 1 female around! At the moment I'm debating whether she'd be more or less stressed if I set up the back-up tank and removed her.
My question is: are mollies fish that change sex as they get older? Were they just immature and too small to sex properly? If they have changed sex, is it to do with the tank conditions in some way? Will they change back, or is it going to be a case of taking some of them back to be exchanged?
I'd appreciate any advice on this one.
I've just started keeping mollies. I bought 2 males and 3 females, reasoning that having more females than males would be a good idea.
They were pretty small when I bought them, but having kept platies I was totally confident that the shop assistant had sexed them correctly when I took a look at the anal fins.
However, I've been on holiday for a week and come back to find what appears to be 4 males chasing 1 female around! At the moment I'm debating whether she'd be more or less stressed if I set up the back-up tank and removed her.
My question is: are mollies fish that change sex as they get older? Were they just immature and too small to sex properly? If they have changed sex, is it to do with the tank conditions in some way? Will they change back, or is it going to be a case of taking some of them back to be exchanged?
I'd appreciate any advice on this one.