I added 3 leopard endler's hybrids and an african dwarf frog to my 20 gallon tank that I cycled with 5 danios. The endler's are taking no crap from the danios and are bold little guys. The ADF is terrified. The fish are curious about him but he freaks out whenever they get too close. Should I have bought 2 ADF's so he has company? Are my fish to active to have an ADF? I can certainly get another one but I don't want to end up with two terrified frogs in my tank.