I have a 30 gallon tank with 2 mollies, 1 platy and 6 tetra. I didn't cycle the tank before I put fish in 3 weeks ago. My Dalmatian molly is losing weight and acting weak but the other molly and platy seem to be healthy. I don't have a test kit yet but the temp is 70 degrees. Can anyone tell me what is wrong with the Dalmatian? And is the molly at the end of the video (black and yellow) pregnant?
Ammonian, nitrites, nitrates, and PH need to be known. The dalmation does appeasr to be a little skinny what are you feeding them? The molly at the end does appear to be pregnant as well as a little bloated. Is that one getting most of the food your dropping in?