Hi, I really need help. I have 6 tigerbarbs (3 albino and 3 green) and 2 silverdollars. I've been noticing that the tigerbarbs are attacking the silver dollars, both of their tails are completly gone, and one of them looks like he's dying... I've been feeding them 2x's daily, so I don't think they are hungry, just aggressive. Everything's within normal range, so I really don't know what's going on. Why are the tiger barbs attaking the silver dollars, what can I do to help the silver dollars, and how do I prevent the barbs from attacking them again, please help asap