hav a betta in a 20 long, right now he is the only fish in there. i am usin a Penguin 150 for filtration and i was wondering is this a 2 strong a current for a betta. the filter will cycle 150gl an hour. i watch my betta and it seems to swim ok not gettin pushd against the wall or anything. but sometimes when he gets close to the out flow of the filiter he gets pushed down by it. am i makin his life miserable by havin him in the 20 gl with tht filter? is there a way to slow the flow of my filter without damagin my filter or the filter process. just lookin for suggestion and any advice ppl may have