[quote author=Reefdad link=topic=6579.msg85604#msg85604 date=1235957400] How do I know when my cycle has started? Should I keep testing or let it sit? And do I start my lighting cycle as well? [/quote] Are you adding an ammonia source to the tank on a daily basis or a large hunk of something (fish food, piece of shrimp,etc) ? Once you start that, the "good" bacteria will start to grow and multiply. At first you should look for a jump in Ammonia, then Nitrites, then Nitrates. As your Nitrates climb, your ammonia and nitrite levels should drop. Of course, periodic testing is necessary. Try testing in a week to see where you stand, then do regular testing to watch for completion of cycling. [quote author=Roc link=topic=6579.msg85607#msg85607 date=1235960516] lighting is not really important as you are using dead rock. I would save my bulbs and electricity [/quote] +1 What Roc said about lighting. You don't need light to cycle a tank.