i am considering using my 30 gallon tank to keep an octo. First off wich species would be ok in a 30 gallon? I have 20lbs. of live rock and 25 lbs. of live sand some of the live rock apastia sp? anemones growning on them could this be a problem they are very small. also will a protein skimmer and a submersible filter along with a powerhead be enough filtration and water movement? i already have a 10" air stone in the tank as well. what type of lighting would be reccommended? Is there anything else i need?