i have 3 female mollies. I believe that at least one is pregnant and today i noticed that she and one other female have been laying at the bottom of the tank today. the for sure pregnant one will still shoot to the top of the tank to eat but the other (dalmation) molly hasnt. i tested the water and everything was fine. nitrates: 10 nitrites: 0 as far as ammonia i have no idea we ran out of strips and no money currently to buy anymore. my question is does anyone know why they are resting on the bottom of the tank? as im typing this i turned off the light and the dalmation molly has returned to the top of the tank and the pregnant girl is swimming up and down. also we changed the water two days ago and it cloudy again (greenish). does this have something to do with their behavior? the other fish seem to be fine. swimming around as usually. the other fish are a male black molly, 2 male black phantom tetras, and 4 male guppies. also we have the other female molly i mentioned above but she is always weird. she is smaller than the one we think is pregnant but she has these black spots on her side that showing from the inside they are not outside her body. we have no idea what that means. her and the pregnant one are Cremecicle Lyretail Mollies. if anyone know what those black spots mean on her plz let me know.