Originally Posted by morningdove2930
make sure you cycle your tank and only put demsels of chromis in at the first most pet stores will let you trade them in when your tank is cycled and you are ready to put the fish you want in. those fish are very hardy and will help cycle your tank.
I understand that you have just begun to post here, so please don't take offense. We are always happy to have new members and happy to help. However, I disagree completely with this advice.
Aquariums with live rock and sand have no need for this. The bacteria will develop naturally with the slight die off that occurs when moving the rock from one tank to another, and the bacteria are already present in the rock and sand. In reality, such systems will never even see an ammonia or nitrite reading, or will only see a few short days of a traditional freshwater style "cycle".
Adding damsels or chromis would serve no purpose at all and would only cause you headaches in trying to remove them.
If you provide more details about your setup we can really offer some guidance over these first few critical months.