I have a 20 gallon aquarium thats about 24 long, by 14 wide by 14 inches tall. Im really wanting to get a ai nero for my tank but Its really hard to find a nero 3. Would a nero 5 be overkill for my tank. I know it goes up to 3000 gph what would be tge lower settings. I plan in have lps dominant with some sps in the distant future. Thanks in advance!