http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=4-tiger-barbs-and-1-bala-shark-died#1 I had 6 tiger barbs, 2 bala shark, 2 rainbow shark, 2 silver dollars and 1 turtle. My 4 tiger barbs and 1 bala shark died. Who may have killed them or can there be any other reson for their death? sanhita 2009-06-02 http://forum.aqua-fish.net/?topic=4-tiger-barbs-and-1-bala-shark-died#2 What size is your tank and do you test your water? mickey 2009-06-03 http://forum.aqua-fish.net/?topic=4-tiger-barbs-and-1-bala-shark-died#3 rainbow sharks are aggressive and terratorial. It is not advisable to keep them with similar fish, so it may have viewed the dead fish as rivals. Like mick suggested water perametres could be responsible. Also If your tank is too small this can cause some quite placid fish to become stressed and aggressive. Post more info so we can help, please? good luck with the fish in future weirdartist 2009-06-03