I have some guppies and mollies along with a marmokreb in a 10 gallon tank at 78 deg, atm no other particulars on the tank as I have no test kit (will buy one today).
The tank has been up and running for more than 3 months. There are 3 guppies (adult) and 9 mollies (2 adult and the rest are fry) and the one crayfish.
I vacuumed the gravel and did approx 30% water change last week.
Here's the issue. One of the guppies has been rubbing on the rocks and substrate. I can see no discolorations or spots. When it darts between the large sandstone rocks, it looks as if its dorsal fin is being held close to its body.
The tank has been up and running for more than 3 months. There are 3 guppies (adult) and 9 mollies (2 adult and the rest are fry) and the one crayfish.
I vacuumed the gravel and did approx 30% water change last week.
Here's the issue. One of the guppies has been rubbing on the rocks and substrate. I can see no discolorations or spots. When it darts between the large sandstone rocks, it looks as if its dorsal fin is being held close to its body.
