I recently got 2 motoro pups. They swim around anytime my lights are off, but as soon as I turn my lights on they hide under the sand. I had 2x10k bulbs 36" on my 48" 120g tank. Figuring my bulbs were to bright I switched one of the 10k bulbs to actinic to make it a little dimmer, they still hide whenever the lights are on. Any suggestions?