yea, they are wicked fish. The other thing that is so cool about them is how the mated pair stick together so passionatly. They are always in a centimeters of eachother and if one gets scared, its straight back to the other one. A funny thing I just noticed is if you put some brine shrimp in the tank with all the powerheads on, and they frantically swimm for them. I normally turn the powerheads of at feeding time but I did this to see what happened, it isn't something that I would suggest to do ofted, may get enoying for the fish.