I am currently battling a low water movement issue in my tank. My tank is a 125 gallon tank. I have a canister filter than turns over 165 gallons per hour and a powerhead that does 270 gallons per hour (Did some research, the power head pumps more than I thought). That puts me at almost 3.5 turn overs per hour. I am sure that neither of them pump at what they say they do, so round down to 3.0 turn overs per hour. As I look into getting more water movement, would I be wiser to get another filter or is it safe for now to get another power head? The power head will move more water compared to a canister filter (at least the canister that I have (Ehiem)). I am sure the filter is more valuable overall but the powerhead will be far cheaper for now. Can I get away with a big powerhead for now?