Just about on the 3 week mark of the tank. Their is ammonia and nitrates in the tank. Getting just small amount of green algae on my live rock. And some brown spots on my base rock. The sand is got the brown spots as it should if tank is cycling. So what should be the next step. Some say water change. Some say to put another shrimp in after the ammonia goes to zero. And some say add a clean up crew. What are the max levels the nitrates be and the ammonia.
