I hope to put a gulper catfish in my Silvers tank..... I'm just waiting for my silver to get a bit bigger because I've seen what gulpers are capable of.
I've HEARD that bichirs work well too, given that they typically occupy the lower part of the tank while the aro's cruise the top.
I've HEARD that bichirs work well too, given that they typically occupy the lower part of the tank while the aro's cruise the top.