Okay so finally getting around to posting my idea.I think you should do a planted, black water south american biotope.
Flourite topped with Eco complete with a fine layer of sand on top.
Large branchy pieces of Redmoor placed as if they are roots from trees trailing into the water, and some smooth river pebbles.
Flame Moss - Taxiphyllum sp. (attached to the wood)
Pterophyllum altum x6
apistogramma borellii x4
corydoras adolfoi x16
Red Eye Tetra x12
phantom tetra x20
whiptail plecostomus x3
Most of the plants i listed are heavy root feeders hence the nutrient rich substrate but the addition of pressurized co2 would really set the tank off..
PS. a black backround