Powerhead in a 20 gallon long? yes or no?

[scubadawg]

Hi
I just did a 20 gallon long Nano reef, and finding out that this powerhead (Marineland maxi jet 1200) really moves a lot of water, too much more this tank, I have 2 new Hydor Koralia Nano Evolution 240 GPH coming in Friday, I hope, Do I really need to runs this powerhead, or can I get away with just using a Aquaclear 70 filter and a Rio Nano skinner, for a few days, until I get a less powerful powerhead.

Thanks