ok so i know they aren't cichlids but they are going in with my cichlids so figured i would post here. but yeah so i got some tiger barbs from petco since i was wanting to get a schooling fish that would have a chance of surviving in my tank and petco was having a 5 for $5 sale and figured i would grab a couple of the green ones as well to mix up the school a little bit even though they were more expensive. well i have them growing out in small 20g long with 2 jag babies (1.5in long). 2 days after buying them i find that one of the green barbs has died and been eaten, and he was the largest and was acting completely normal and eating for those two days. now about a week and a half later the other green one i bought died as well. now this was after moving the tank to a friends house where i am staying for several weeks and they all were pretty stressed out but he didnt die until several days after this move and had been acting totally normal in those several days. i just thought it was weird that two seemingly healthy fish would just suddenly die and that both of them would be the only 2 green tiger barbs that i bought. are they just weaker or is there some kind of racist thing going on with the other barbs? my tank has been set-up for like a year and i do at least weekly water changes, sometimes more (since its a grow out tank i keep the water pristine to have the fish grow as fast as possible)