One of my Rainbow sharks keeps rushing the other. More so when I'm feeding them. I think hes stoping him from eating. Now the one whos "attacking" is really big and the others small. The small one is also albino, the other is just normal black. If that matters. What I was wondering is should I be worried about what hes doing? or will he get over it? or are albino rainbow sharks weaker than non-albino rainbow sharks? Also the albino still has his full fins so theres no fin biting.