Why do my dalmatian mollies keep dying??!!
A few weeks ago we bought two dalmatian mollies that were both females. They came with a baby too. After about a week both adult mollies died in the same night, but the baby was perfectly fine. So then we went this last weekend and bought two more adult mollies, this time a male and female. The second day we had them the female had 7 babies, 4 of which are still alive in my breeder trap. Last night I noticed the female was swimming really recklessly and seemed like she had gone blind. Her gills also looked swollen because I could see the layers of them sticking out of the gill covers. The male seemed fine, but within an hour he was dead and the female still swimming wierd. All of my babies, including the one that came with the original batch, are all fine. This morning the female was still swimming blindly and still had puffy gills. I tested my water last night for nitrates and it was at 40ppm. The tank is a 10 gallon with a heater and an airstone. I don't have a filter. What confuses me the most is that if something is killing the adults, shouldn't the babies be dying too since they are younger and have weaker immune systems? How can I help my poor fish?