Live rock lets you create a versatile, natural landscape for your saltwater inhabitants. It provides a foundation for the growth of beneficial coralline algae and live corals and offers shelter to many animals. Tiny microorganisms found on and in live rock offer a natural food source for some fish, and live rock also aids in the breakdown of waste produced by aquarium inhabitants.
Using live plants in your freshwater aquarium will create a lush green landscape and benefit the health of your inhabitants. Plants produce oxygen, which in turn reduces the amount of carbon dioxide and ammonia in the aquarium water. Plants also will compete with algae for nutrients, thereby limiting the opportunity of algae to grow and thrive.
Driftwood can be used to anchor plants or to create "tea-stained" soft-water conditions in order to replicate the conditions found naturally in Amazonian Black Water biotopes populated by Neon Tetras and Rummynoses.
Since no special considerations need to be taken for its use, artificial décor can be placed in your aquarium immediately, unlike some natural décor that requires a period of acclimation or curing. The real-life detail of artificial décor also lets you create a natural-looking setup or gives you the flexibility to mix and match décor to suit any style.
In addition, artificial décor won't ever affect your water chemistry. For example, unlike live plants, artificial plants do not release oxygen, nor do they need lighting, substrate, or food. Likewise, artificial driftwood won't release tannins like real driftwood, allowing it to be used in any type of aquarium, even saltwater.