Hi Guys , I recently bought a Motoro Stingray 3 or 4 days ago. The first day when it was introduced it was flapping around and exploring around like a puppy , but during the second day it just stayed at one spot and never moved , but only sometimes it moves just a little and then go back to the spot and never moved again. I've done a 40% weekly water change and tested the water before the day I introduced my Motoro Stingray. I need help!! Thankss!