Single Head OG Holy Grail Torch

Torch corals (Euphyllia glabrescens) are stunning, but they can be finicky. Here’s a complete care guide:

Ideal Conditions

Water Parameters

Temperature: 77–80°F (25–27°C)

Salinity: 1.025–1.026 SG

pH: 8.1–8.4

Alkalinity: 8–9.5 dKH

Calcium: 420–460 ppm

Magnesium: 1350–1450 ppm

Nitrate: 2–10 ppm

Phosphate: 0.02–0.08 ppm

Stability is more important than exact numbers.

Lighting

Moderate light

PAR: 100–200

Acclimate to light slowly

Flow

Moderate, gentle back-and-forth movement

Too much flow: retraction, tissue damage

Too little: algae, poor health

Feeding

Photosynthetic but benefits from feeding

Feed 1–2× per week

Good foods:

Mysis shrimp

Brine shrimp

Reef roids (light use)

Minced meaty foods

Placement

Give 3–6 inches of space (long sweepers)

Place lower first, move up slowly

Common Issues

Recession: alk swings, pests, too much flow/light

Brown jelly disease: frag/remove infected head, increase flow

Not opening: flow/light stress, irritation, water quality

Bleaching: too much light or sudden change

Compatibility

Good with peaceful fish, clean-up crews, other euphyllia (with caution)

Avoid aggressive corals and nippy fish like dwarf angels

Maintenance Tips

Test alkalinity frequently

Keep moderate nutrients

Use activated carbon

Maintain stable Ca/Mg/Alk dosing

Pests

Brown jelly bacteria

Flatworms (rare but possible)

Vermetid snails

Dip new corals before adding.

Would you like help diagnosing your torch coral or planning placement in your tank?