Darren87_Sg;1917975; said:depends on how big ur rtg and ur silver is.a 340 gal is huge but u also have to see the length,width,n height of the tank.the most important is they have to turn gracefully and as they grow to huge proportions,if lets say the silver makes a turn at the end of the tank and the rtg just happens to be there when it turns,it will obstruct the rtg from turning oso and they may engage in combat.but u can risk it but there will be surely broken fins,small bruises on both your aros.