Wooden Fossil Stone, also known as Petrified Wood Stone, is an intriguing choice for aquarium hardscaping. Here’s some information about using it in your setup:

1. Appearance: Petrified wood stones have a unique look, often displaying wood grain patterns and earthy tones ranging from browns to reds. This can add a natural and warm aesthetic to aquariums, making them ideal for creating biotope or nature-inspired aquascapes.

2. Water Chemistry: Generally, petrified wood is chemically inert, meaning it has little to no impact on water hardness and pH. This makes it a suitable choice for a wide variety of aquatic environments and inhabitants.

3. Potential for Planting: Its textured surface can provide excellent anchorage for epiphytic plants like Anubias, Java Fern, and mosses. This allows you to create lush, green highlights against the stone's earthy backdrop.

4. Preparation: As with any natural decor, it's important to clean petrified wood thoroughly before adding it to your aquarium. Rinsing and scrubbing with a brush can help remove any dust or debris.

5. Design Ideas: Use petrified wood in combination with other hardscape materials like rocks and driftwood to add complexity and interest to your aquascape. Consider varying sizes and orientations to create a more dynamic appearance.

6. Maintenance: While petrified wood stones are durable, regularly check their placement to ensure they remain stable and safe for your tank inhabitants.

7. Compatibility: As it's largely inert, petrified wood is compatible with a wide range of fish and plants, making it versatile for different data-types of aquariums.

Using Wooden Fossil Stone can impart a timeless and sophisticated look to your aquarium, offering both functional and decorative benefits.