Driftwood in Aquariums: Tannins, Prep & Benefits
Driftwood is beautiful and good for fish.
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Why use it
Driftwood creates natural scapes, gives fish hiding spots, and releases tannins that gently lower pH and have mild antibacterial benefits — ideal for soft-water fish like tetras and bettas.
Tannins and tea-colored water
New driftwood leaches tannins that tint the water like weak tea. It's harmless (many fish love it), but to reduce it, soak or boil the wood first and run activated carbon.
Prep and sinking
Boil or soak new wood for a few days until it sinks and stops clouding the water. Some plecos need driftwood to rasp on as part of their diet.
Recommended gear
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FAQ
Why is my aquarium water brown after adding driftwood?
Tannins leaching from the wood — harmless and natural. Soak or boil the wood first, do water changes, and run carbon to clear it.