I am only three weeks into having a freshwater aquarium (my very first). This is very new to me, and I probably didn't do as much research as I should have to begin with. But, that being said, I am truly enjoying it so far.
I have a 20 gallon tank, and about five days ago got 4 mollies (two dalmatian and two gold dust), 2 ghost shrimp, and 2 little catfish (not sure the exact name).
One problem that cropped up today- I think the two gold dust mollies are male (from what I've been reading) and the dalmatian are female. This afternoon when I went to feed them, the two male mollies started fighting. they are both going after each others bottom fin and one is being more aggressive. I guess my question is, should I buy another tank and try to separate them? Will they hurt each other? Or is it a typical male thing to show dominance? I was under the impression that mollies were peaceful towards each other and other fish.
Anyway, I've learned a lot from reading this forum and I plan to post some pictures of the fish and tank soon.