Aquarium decorations are not purely aesthetic; they create territory, provide hiding spots, reduce stress, and influence fish behavior. Thoughtful decoration improves fish welfare while creating a beautiful display.

Driftwood

Natural driftwood provides surface area for beneficial bacteria, releases tannins that soften water and mimic natural habitats, and serves as a foundation for mosses and ferns. Boil new driftwood before adding to remove excess tannins and kill potential pathogens.

Rocks and Stones

Dragon stone, seiryu stone, and lava rock create natural-looking hardscapes. Test rocks for calcium content with vinegar; fizzing rocks will raise pH and hardness. Stack rocks securely to prevent collapse. Avoid collecting outdoor rocks that may contain contaminants.

Live Plants

Live plants provide natural filtration, oxygenation, and hiding spots while creating a stunning visual display. Easy beginner plants include java fern, anubias, and hornwort. Start with low-maintenance species before advancing to demanding planted tank setups.

Artificial Decorations

Quality artificial plants and decorations are safe and maintenance-free. Choose items specifically designed for aquarium use, as craft store materials may leach toxins. Avoid decorations with sharp edges that can damage fish fins or rough surfaces that can abrade skin.

Layout Principles

Use the rule of thirds for focal point placement. Create depth by placing tall items in the back and shorter items in the front. Leave open swimming space in the center or along the front glass. Provide enough hiding spots that shy fish feel secure.

Maintenance

Clean decorations during water changes by rinsing in old tank water. Avoid soap or detergents. Algae-covered decorations can be soaked in diluted bleach and thoroughly rinsed. Replace any decorations showing signs of deterioration or coating breakdown.