Someone posted the idea of a transparent tank a few months back. I loved the idea and have kept it tucked away for my next tank! I recently upgraded the lighting in my 55 gallon community which left me with two perfectly good 24 inch hoods. What a waste! I had to buy a tank to fit one of them so I am the proud new owner of a 20 gallon high. I plan on moving a school of 7 glowlight tetras from the 55 to the 20 high. I must have glass catfish though! How many can I fit in a 20 high? We are going with a sand substrate and a black background. My son picked out a skeleton in a coffin air bubble ornament and i'm looking for a sunken ship ans some nice rocks for the bottom. How many fish will this tank hold? What kind of plants will go well with the 'ghost' theme?