My 75 gallon Fowlr tank has been in a cycle since 01-15-10. My ammonia is at 0 and my nitrite is at 0. However my nitrate has spiked from 20 to 40. Is this normal? Will they drop? Tommarro I'm going to fan off some of the debris on the live rock and then vaccume the gravel to see if that will lower them. What do your guys think?