Die off if any, but my question is , I set the tank up with the liverock and some fresh saltwater mix . I let the water clear up for a day to rearrange the rocks I dropped in , then yesterday I decided to add a full 75 gallon rated bottle of biospira . I then added almost 2 ML of ammonia . Today when I tested the water less then 24 hours later , my levels are ALL at 0 except for nitrates . Did the tank being setup with all liverock help drop those levels in a 24 hour period along with the bottle of biospira ? Nitrates were at 40ppm.