OK, I have a 10 gallon aquarium and I'm not sure what filter to use. I currently have the topfin power filter 10 but it isn't very good. I will be using my future filter with a sand substrate and I have 2 african dwarf frogs. I hope to add a male betta and live plants. Now, what new filter do I choose? I've narrowed it down to four filters. They are : Aqueon® QuietFlow Aquarium Power Filter 10.... MARINELAND® Penguin 100B Power Filter.... Aquaclear® Power Filter.... or the internal Fluval U1. you can find all these filters on this page, http://www.petsmart.com/fish/filters/cat-36-catid-300088?SearchParameter=%26%40QueryTerm%3D*%26CategoryUUIDLevelX%252FnfoKmUCQmRYAAAFD8RNUeFk3%252FVRgKmUCQ1EIAAAFD5j9UeFk3%2 I hope that some of you have had experience with these filters and may be able to help me choose the right one for my tank setting. Thanks!