This may be a silly question. I have a 2.5 gallon, heavily planted, with one Sunset Coral Dwarf Platy and one Panda Cory (in the process of moving him into another tank with friends). At one point, I had brought home a male dwarf platy (the one I have currently is female). Within a matter of days, he passed away, apprently due to an extreme nitrite spike. Lately, I have been noticing that my girl is getting a round stomach. Is it possible that she conceived within those few days? Or perhaps she is just being overfed (I am feeding a small pinch once daily)? Any input would be greatly appreciated.