If I take the HOB filter off my 65 gallon, I am not getting enough water movement with just the canister filter going. I have tahitian moon black sand for my substrate. What size powerhead should I get for my tank that will create as much movement as possible to get more of the junk off the bottom so it can get sucked up by the filter, but also not blow sand around? Also, would the powerhead create enough surface movement to provide aeration for my tank or do I need something else to get oxygen into the water? Is there a certain brand of powerhead that is considered the best/most quiet?