Consider using natural substrates like sand, gravel, or aquatic soil to mimic the fish's natural habitat.
Live aquatic plants not only add beauty but also provide oxygen and serve as hiding spots for fish.
Incorporate rocks and driftwood to create caves, tunnels, and overhangs. These elements serve as shelter for fish and add a natural, textured appeal to your tank.
Artificial ornaments like sunken ships, castles, or coral reefs offer a creative touch. Ensure they're made of fish-safe materials and provide enough open swimming space.
Invest in suitable aquarium lighting to showcase your decor and promote plant growth. LED lights with adjustable color spectrums can create stunning visual effects.