I think I’ve come up with a solution to my noisy filter problem. After taking advice I’ve received on this forum and that of the helpful person at my pet store I’ve decided to keep the filter I have and put it on a timer to go off at 10:30 pm and on at 6:30 am. I also purchased a pump and air stone wand that goes the length of the aquarium. When the filter goes off the air stone will still be running creating movement at the surface. The pump is virtually silent and the air stone makes no noise. The outside filter kept me awake with the cascading water falling all night. If anyone has any opinions or comments I welcome them. Thanks!