Start with the end use
How you clean driftwood depends on where it will live. Aquarium wood must stay chemical-free. Lamp and décor pieces can take stronger cleaning and a sealer. Terrariums sit in the middle—clean and dry, usually without film-forming finishes.
1. Dry cleaning first
Knock off sand, loose bark, and mud before you soak anything.
- Brass or nylon wire brushes — Scrub with the grain. Brass bites harder for bark; nylon is kinder for finished or soft pieces. Soft brushes leave fewer marks. (wikiHow)
- Pressure washing — Great outdoors for loose grit. Use a modest stream; too much force can strip detail or crack thin limbs. (wikiHow)
- Soda blasting — Sodium bicarbonate media lifts paint, grease, and grime while staying gentler than hard grit. On wood, start around ~15 PSI and work up—often ~30–60 PSI—keeping the nozzle moving. Rinse the water-soluble soda residue afterward. (ACF International; WoodThrive)
- Sand / media blasting — More aggressive. Prefer soft media (e.g. crushed walnut) and low PSI (~30–50). Always test a hidden spot and blast with the grain. (Universal Powder Coating)
2. Soak, boil, and cure
Soaking waterlogs the wood (so it sinks) and leaches tannins that tint water tea-brown. Change the water as it darkens—often every 1–3 days—until the piece sinks and the water stays only lightly tinted. Small pieces may take days; dense Malaysian or mopani can take one to three weeks. (Freshwater Guides; Fluval)
Boiling (about 1–2 hours for pieces that fit a pot) speeds sterilization and tannin release but does not replace a proper soak. Skip boiling oversized pieces that could crack, and avoid boiling delicate bog/moor woods some aquascapers warn about. (Scale & Stem; AquaLexicon)
Craft tip: some woodworkers soak décor wood in a hot washing-soda bath for a couple of days—useful for crafts, not a substitute for aquarium curing, and rinse thoroughly. (wikiHow)
3. Aquarium-safe practices
- Tannins — Harmless to most fish; some keepers like the blackwater look. Clear it with water changes, activated carbon, or tannin resin if you prefer crystal water. (AquaLexicon)
- Safer wood types — Purpose-sold hardwoods such as mopani, Malaysian driftwood, spiderwood, manzanita, and cholla are common choices.
- Avoid — Softwoods and resinous woods (pine, fir, cedar), freshly cut green wood, chemically treated lumber, and wood from polluted sites. (MarcusFishTanks; Thien Duc Aquarium)
4. Drying, pests, and mold
For lamps and décor, rinse/desalt in fresh water, then dry slowly in a shaded, ventilated spot until bone-dry. Trapping moisture under a finish invites mold and peeling. Small pieces can be boiled; some makers carefully bake small pieces at low oven temps (often cited around 200–250°F) to discourage pests—watch closely for scorching and never leave an oven unattended. Freezing is another option for pest peace of mind on some pieces. (Woodworking Advisor; IERE; terrarium notes via ChameleonTips / NEHERP guidance)
5. Sealing for décor & lamps (not tanks)
Only seal wood that is fully dry and will not go in an aquarium. Options include penetrating oils, beeswax buffed for a natural feel, or clear polyurethane for harder wear—thin coats, full cure. For an eco-minded outdoor/décor preservative, many DIYers look for Eco Wood Treatment (also marketed in the LifeTime® / Valhalla family tradition): a water-mix mineral/plant powder that develops a silvery weathered patina in one application, with no solvent film. Manufacturer sites: ecowoodtreatment.com and valhalco.com. Demo video: Lifetime / Eco Wood Treatment deck demo.
Note: we could not verify a “Lonnie Wilson” inventor credit in public sources; Lonnie Johnson (Super Soaker) is unrelated. Eco Wood Treatment is led publicly by Bruce MacNutt (CEO); Valhalla describes LifeTime as a multi-generation family recipe.
Quick checklist
- Inspect for rot, soft spots, chemicals, and strong odors—discard bad pieces.
- Brush → optional blast/wash → soak/cure (tanks) or dry fully (décor).
- Aquariums: water only, no bleach residue, no sealers.
- Lamps/décor: dry completely, then wax/oil/poly or eco powder treatment.