How much decoration should I put in my aquarium?

Fill approximately 30-40% of the tank volume with decorations and hardscape. This provides adequate hiding spots while leaving swimming space. Fish need both shelter and open water. Overcrowded decorations restrict swimming and create dead spots with poor water circulation. Minimalist designs can work if hiding spots are strategically placed.

Why is my driftwood turning the water brown?

Driftwood releases tannins — natural organic compounds that tint water amber or tea-colored. This is harmless and many tropical fish prefer tannin-rich blackwater. To reduce tannins: soak the wood for 1-2 weeks before adding to the tank, use activated carbon in your filter, or perform extra water changes. The tanning effect decreases over several weeks to months.

Best Aquarium Decorations 2026