Ive had this tank sitting in my house for almost a year..... i finially added 120 lbs of sand and began adding fresh ro/di water. now i know live rock is very expensive so i was wondering if a protien skimmer would be ok to hold a small bioload. If i get a percula clown fish or 2 would it be ok to have only 18 lbs of baserock in there or do they need more stuff to hide in?...would like to get tank running soon.