Brown tang

Environment

Minimum volume: 400 liters for an adult specimen. Well-established reef aquarium with abundant live rock forming hiding spots and grazing surfaces. Stable seawater: temperature 24-28°C, pH 8.0-8.4, salinity 33-36 g/L, calcium 400-450 mg/L. Moderate to strong water flow and lighting that promotes algae growth. Free swimming space essential. Stable parameters crucial: sensitive to salinity fluctuations and nitrates.

Feeding

Strictly herbivorous. Dietary base: natural algae (caulerpa, sea lettuce) and dried algae (nori) several times daily. Supplement with quality vegetable-based pellets and flakes enriched with spirulina. Blanched fresh vegetables (spinach, zucchini) as supplement. Feed 2 to 3 times daily in small amounts. Regular intake of plant fibers is crucial for intestinal health and immune system.

Health & common diseases

Generally hardy species but sensitive to stress and marine parasitic diseases. Common diseases: marine ich (Cryptocaryon irritans - small white spots on body and fins), marine velvet (Amyloodinium - golden dusty film), HLLE/lateral line erosion (nutritional deficiencies, poor water quality). Prevention: systematic quarantine 3-4 weeks, varied diet rich in vitamins, impeccable water quality (nitrates <20 mg/L), stress reduction. Scalpels at the caudal base can inflict injuries during conflicts.

Tips & tankmates

Territorial toward other tangs, especially of the same genus: introduce only one Zebrasoma scopas or add it last. Compatible with most other peaceful reef species. Safe with corals. Excellent algae eater but may nibble some soft polyps if underfed. Preferably introduce young (8-10 cm) to facilitate acclimation. Avoid overcrowded tanks: needs space to swim. Jumping risk: lid recommended. Respect a slow acclimation period (drip method) during introduction.

Sources

• FishBase - Zebrasoma scopas
• World Register of Marine Species (WoRMS)
• Reef-safe marine angelfish and tang guide