hi all, bought 2 gbr's yesterday from a lfs shop i'd never been too before not a huge selection in fish but what he had were quite unusual and seemed pretty competative, i.e discus £25 for 6" specimens green tiger barbs 10 for £6, bronze corys 6 for £5 etc, but i did notice some tanks fish looked a little lethargic and quite a few with fin damage, i should of just bailed i guess but after driving 20 miles to get there i had my plans on a pair of GBR's, they were about 3" in length i got them home and acclimatised them in the tank 20 mins later left in a touch of the tank water then left them acclimatise again then repeated before i released, fish swam strait to the bottom and hid not unusual, after about 4hrs i spotted the male he was breathing very rapid and was washed out, after about 6 hrs i found the female she had settled on the substrate not good i thought the male seemed to be buddying up with the bolivians i have in the tank so by the evening he was swimming with them although still washed out, but this morning i came down and the female was DEAD the male is still swimming with the bolivians although still washed out and breathing faster then the bolivians, checked tank strait away and all readings are fine, all the other fish are fine ph is good temps are good basically everything is good so was it just a "weak fish?", or maybe shock? and do i now need to replace the female to stop any poss aggression? i no my tank is good so whats going on??