Ok today I removed all of my bio-balls and replaced them with about 5lbs of live rock rubble. My question or any suggestions, should I be concerned about anything with my tank. The tank has been up and running for 3 weeks now,the only stock I have so far is 2 clowns that are acting normal so far. So if anybody may have any suggestion about concerns that I should have after replacing the bio-balls with live rock rubble after being up and running for 3 weeks, I am very interested in hearing them. Thanks