Anyone else ever notice this, its like all the sudden my natts like let out a royal rumble on each other. A few started nipping each other then all the sudden every p was for itself and they all went into a circle almost and just started battling, i watched it for about 2 mins then i went upto the tank and broke it up. I got a cheapass heater on the tank and noticed the temp was upto 82 degrees,(usually keep it around 78) so that might of been it. Out of the eight, four of them had decent sized fin nips. Then after that they were fine..... just thought it was strange.