I have 2 Eclipse 3's. I love them. They keep the water nice and clear and the filters are sooooo quiet. As for the current, both bettas (and zebra danios) love it. They like to play in it and just lay on the cave that I have and let the water wiggle their fins. :P I suppose if the betta didn't like it you could just put a tall plant in front of it and it would be okay because they have plenty of room to go to the other sides of the tank.