i’m a bit worried about my Clown fish. I have the fluval evo 13.5 and have just recently changed the filtration to in tank media basket with chemi blue, marine pure gems, bio plus coarse and nitrax with filter floss on top woth the siice 1.0 pump. Come back from wprk today and he doesn’t seem to be himself. Sitting in corner of tank like this. I have checked the parameters of ph, amonia, nitrite and nitrate but nothing major on readings.