Demogorgon Chalice Coral (Echinophyllia sp.) prefers low to moderate light (60–150 PAR) and gentle, indirect flow that keeps tissue clean without lifting edges. Begin in lower areas or shaded ledges; slowly increase light over 2–3 weeks to avoid bleaching. Place on stable rock with the rim supported; avoid direct sand contact. Leave 3–6 inches of space from neighbors—chalices deploy stingers at night and can burn soft and stony corals. Feed 1–3 times weekly at dusk with small meaty foods (mysis, reef roids, finely chopped seafood) when feeding tentacles are out; moderate nutrients support color: nitrate 5–15 ppm and phosphate 0.03–0.08 ppm. Use a turkey baster occasionally to blow off detritus.Keep stable water: temperature 75–79°F (24–26°C), salinity 1.025–1.026, pH 8.1–8.4, alkalinity 8.0–9.5 dKH, calcium 400–450 ppm, magnesium 1300–1400 ppm. Chalices are sensitive to rapid alkalinity swings and sudden light/flow changes; test weekly with reliable kits and verify periodically with lab testing. Acclimate with a 30–45 minute drip, then coral dip to remove pests. Common issues: edge recession (often from high light or unstable alk), tissue lifting (excess flow), and browning (too little light or very low nutrients). If stressed, lower PAR, reduce direct flow, feed lightly, and improve stability. For compatibility, avoid aggressive LPS and fast-growing encrusters nearby, and mount on an island rock to control spread.