What I love most about NPT is just seeing a small ecosystem and marveling at the balance that was achieved. It brings a sense of peace. I love looking at the greenery and knowing that they are living, breathing dynamic system. I enjoy seeing the natural sunlight on the aquarium with sparkling water and bubbles forming on the plant leaves and bubbling to the surface. Each plant from the planted ones to the submerge ones to the floating ones each do its part to maintain a mutual balanced aquarium. With fish swimming through the upper regions of the tank while others clusters at the bottom regions and still other on the substrates and side walls doing their daily routines are very calming. To balance out the day, at night the trumpet snails emerge from substrate to take on the activities while other day creatures are fast asleep. It's really hard to believe how easily life can generate, grow and prosper given right conditions. I must say the side benefit of not having frequent maintenance such as water change a very nice perk. But that really is a testament to a balanced ecosystem as close as we can simulate under the confine of our small space.