Is live rock needed? My friend has a 35g setup with 2 regular aquarium stones about 4 lbs each and a plastic cave. With some crushed coral as substrate. His fish do fine. I personally use LR but he doesnt and they are alright. He has an Ocelloris Clown, a yellowtail damsel and a lawnmower blenny. He feeds Mysis,and Brine shrimp frozen but then thawed of course. How do you feel about LR use? Needed or un needed? I say its a deffinate neccessity.