CB El Diablo Chalice Coral (Echinophyllia sp.) thrives in stable, low-to-moderate light (75–150 PAR) and gentle, indirect flow that keeps debris from settling without lifting tissue. Place low to mid in the tank, starting in shade and moving brighter over 2–3 weeks; use the screen method or raise lighting slowly. Keep at least 3–6 inches from neighbors—chalices can extend stingers at night and will win most close-contact battles. Target-feed 2–3 times weekly after lights out with small meaty foods (mysis, finely chopped shrimp, reef roids) to support growth and color, especially in lower nutrient systems. Maintain temperature 75–79°F (24–26°C), salinity 1.025–1.026, pH 8.1–8.4, alkalinity 8.0–9.5 dKH, calcium 420–460 ppm, magnesium 1300–1400 ppm, nitrate 2–10 ppm, phosphate 0.03–0.08 ppm. Monitor with reliable test kits and avoid rapid swings; this coral is sensitive to sudden changes and excess light, which can cause bleaching.Acclimate with a 30–45 minute drip and coral dip to exclude pests. Mount on a stable plug or rock shelf with room to encrust; avoid direct sand contact if grit collects on tissue. Watch for tissue recession from the edge (often due to detritus, vermetid snails, or alkalinity instability) and correct flow or parameters. If paling occurs, reduce light, increase feeding slightly, and confirm nutrients aren’t bottomed out. Regularly turkey-baste around the coral to keep it clean and inspect at night for sweeper tentacles before rearranging.