Question About Lyretail Mollies

[kreativ]

hey, i have a pair of lyretail mollies, and the female is pregnant, her belly is really big and she cant even move, so about a day ago i separated them to a 10 gal, here are my quest,

1- do i just need the female in the tank alone or with the male?
2- do y need any kind of filter?aeration?
3- the first day they were swimming all over the place together, really close, but now there both just on the bottom of the tank doing nothing, is this normal?

 

[theotheragentm]

1. Alone should be fine, but you don't want to create stress for the fish. Fish will abort fry when stressed.
2. You should have a filter unless you're going to do near 100% water changes every day. The filter should eliminate the need for aeration if it's a hang on back filter and splashing causes the surface to break.
3. Hanging out at the bottom might be a sign of sickness. Make sure the fish have clean water with plenty of aeration. It's really a symptom rather than an illness itself. It's hard to say what it might be exactly.