I have 1 female GBR and 1 female Gold Ram in a 55g. Ive had them for about 2-3 weeks. The gold ram started to be aggressive to everyone but the other ram. And just a few days ago the GBR is chasing only the gold ram around. It doesn't look like its chasing from territory because its all over the tank and constant chasing. There are no ripped fins or anything, just looks that the gold ram is super stressed, breathing heavily and losing a little color.