anybody know what fish wont nip at fins ive got a tetra that is realy agressive i had to move him out of my 20 gallon and put him and 2 others in another tank cause he niped the fins of my new agel pretty good and this is not the first hes done that now id like to get some guppies to put with my agel but i dont wanna wake up and find hes eatin them does anyone think this is a bad idea.