hello,
I have a 20 gallon tank with 4 female guppies, 5 galaxy rasboras, and 5 panda cories. One of my 4 guppies has what looks to be a red bite out of her fin! my water parameters are good, 0 ammonia, 0 nitrites, 5 nitrates, 7 PH. she is a new addition to my tank and I got her because she was...