i too just started a 30 gal reef. i did t5ho's i got 2 korallia #1's and my HOB filter, and my skimmer. my GPH is like close to 1000gph. thats a 33-34x turnover. look into something along that line. i also have 20lbs lr and about 70-80lbs LR. especially if you are going to be doing a reef...