whirling

Three days ago, I added a platy to my tank of one Molly fish. I've had the Molly fish for four months, but I've never seen him swim in circles. Two days ago, he started swimming in circles every few minutes (twirling). I had hopes that he was just playing around, but since he's been doing it for...

Tank Size: 65-gallon pH: 7.6 ammonia: 0 nitrite: 0 nitrate: 0 tank temp: 79 F I 've had a female green terror in a 65-gallon tank for about a year and a half. It is about 4-5 inches and was very healthy until a few months ago. She laid eggs several times a year and of course with no male they...