Hey guys, I have a 180g tank with Oscar, Severum, 3 Dats, 3 Clown Loaches, and 6 Silver Dollars(full grown). The tank has been up for years and the Silver Dollars have been in their the whole time 3-4 years. My question is, I can't stand the silver dollars, they are so skittish and make everyone else in the tank nervous. When the lights are out they are fine, but other than that they are a pain. Can I get rid of them or is it important to have dithers in their, the SD's and Severum are full grown, all others are small as my big Oscar (9yrs) died and the dats are new. Any suggestions?