Ok, so this may seem like a bit much but thought I would give some back story. We have always had a tetra/rasbora tank, first it was a 20gallon now in a 55gallon. We did some research to find that we could put
GBR's in with them so we got 3 of them the store received more and we bought another 4 a week later.(there is still a lot of room as all of our tetras are 1".)two days later we lost one, chalk it up to stress, or whatever the others, leaving 3 males and 3 females very easy to tell with ours as females have nice pink/purple bellies, were doing wonderful. In fact they all claimed their territory we had two pairs and two singles. the one pair that were diligently cleaning their rock/area out was looking promising. Then one day the single female came and stole the male and the "nest rock" kicking the original female out. Then 2 days later they had eggs. The original female having been kicked from her mate/home was picked on by everyone she has become a loner and now in the last few days has become darker in color and stays at the bottom of the tank. We aren't afraid of losing fish as we know it happens but we have never seen something like this before. Would stress coat help maybe? we were holding off as we were told GBRs are sensitive to chems. The rest seem to be great great color/attitude. We have had them about 2mos now. any advise is appreciated thank you.