jlinsey
Aquarium Advice Apprentice
We have a 6 gallon tank with a platy a tetra and 8 baby mollies (in an enclosure). It has been set up for about a month and is not yet cycled, but we are keeping the water quality OK with daily 35% water changes. I have been watching the fish closely, as we lost our first two, and over the past week or so, the platy's dorsal fin looked a bit ragged if you looked very closely. Today it has a big split, about 75% of the way down the fin to the body. It is located about 1/3 of the way from the front of the fin. Otherwise, the fish looks fine. TIA for any advice you can offer!