Noob here. Gotta question on water currents for my Red Devil. He's alone in a 50 gal tank, running a Fluval 304 and a powerhead 50. I've set the powerhead to it's lowest setting and the 304 on a med setting. Having both on appears to generate a lot of water movement. Can this be stressful for him? I've given him caves to hide (One on each side of the tank.) Any thoughts?