I have a 45 gallon tank that will become a new home for several fire belly toads and some neon tetras. At this time i am doing some research and acquiring the necessary items to turn this tank into something nice. An issue I am currently working on resolving needs some input and suggestions from everyone. The tank has the following dimensions: 3' long x 2' tall x 1' wide. In order to sustain the fish I intend on adding I will be filling the tank with 9" of water. This will give me roughly 17 gallons of water. Since the water is certain to get dirty and the fish need oxygen, I need to filtrate this setup somehow. If this were a typical fishtank I would run a conventional filter. This isn't conventional. I will have 27" of space from the water to the top of the tank. I don't believe water spilling down that far would sound pleasant, look pleasant, or be pleasant for the inhabitants. That method would only work with some modifications. I am currently considering an under-gravel system, though I hear those do not filter very well. I was also considering a filtration system that physicals sits in the water, but I am ignorant on those units and need some feedback. The other idea is to modify a side mount filter (conventional filter) and add a longer intake tube and create a long "slide" for the water to run down before it hits the water. If I run with the "slide" idea I will have to figure out a way to create a removable "waterfall" look for it. This take is in my living room, so it will be a visual piece that needs to be attractive. I am open to hearing/reading all of your ideas. If you have input of any kind, please post it. I will be documenting the construction of this thing as I go, regardless as to how this all plays out. I have a brand new Canon EOS Rebel XS 1000D Camera for the photos. (I just need to figure out how to take good pics with it. lol) Post your ideas. I am open to all of them. Help me get the creative juices flowing.