I made this background for my 120 gallon aquarium. It was actually pretty easy to make but it was very time consuming and messy. I'd definitely do it again though! It was a lot cheaper than buying a custom made background and you can make it exactly how you want it. This instructable will walk you through how to make one of these backgrounds. You can adapt this to any size tank. The materials I used are fish safe. ***Note: This is only for FRESHWATER aquarium use!!!
Saw a gorgeous tank w/Neon Tetras & had to find out more. Love the background of these piece of art: Aqua Bonsai is a creative living art of micro aqua landscape in a vase or container with an abundance of aquatic plants. By using the natural ecosystem to maintain its life, it shows the harmony of living things. No air pump needed as the plants give off oxygen- it's just so peaceful! aquabonzai.com