Putting a sponge in front of the filter outtake to reduce flow?

[Enco]

Hi!
I recently ordered a 5.5 gallon tank to house a betta. It comes with a filter. While reading the reviews (on various sites), many people said that the filter (which apparently is a Top Fin 10) produces a current that is much too strong and their bettas have trouble swimming against it. In the interest of not buying an additional filter, I also found someone suggesting a solution of putting a piece of sponge in front of the filter outtake to slow down the flow.

1. Is that safe?
2. ...Where is the outtake? I know that is a really stupid question, but I just don't know what each specific part of an HOB filter is called, and I would like to avoid placing the sponge in the wrong area.

Thanks!

 

[Mumma.of.two]

A sponge will restrict the flow too much. Better off making a bottle baffle. http://www.bettafish.com/showthread.php?t=30139

 

[Enco]

A sponge will restrict the flow too much. Better off making a bottle baffle. Step-By-Step Filter Baffle

Thanks for the info! That's seems very easy to do if I find that the flow is too strong when my tank arrives.