I just bought a used 75 gal tank. I brought about 75% of the water with me thats the water we used in the tank we made the rest of the water. The tank has 2 clown fish that right now seam to be hiding out behind the live rock. I have tested the water all test come back good execept the nitrate test this one is really high. The tank has been only running 2 days so my question is should I just give it some time or do I need to do something to bring the nitrate level down. Any help would be much appriciated.