I have an established 10 gallon nano reef. (Just over one year old) I have heard that you can run an established nano reef without a mechanical filter? Is this true? I have 1 tomato clown, a gobie, and lots of live rock with Sponges, 2 turbo snails, and about 5 soft corals. (leathers and polyps). Could I actually run without mechanical filtration at this stage? Is it possible to do that at all?