My Green Dragon Acropora is fading from neon green to olive—what’s the likely cause and fix?

Color shifts often track nutrient and spectrum balance. Aim for NO3 ~2–10 ppm and PO4 ~0.03–0.08 ppm; too low pale, too high brown. Strong blue/UV (420–470 nm) keeps greens vivid; reduce excess white. Maintain stable alkalinity (7.3–8.3 dKH). Trace balance matters—iron/manganese deficiencies mute green. Increase random flow and avoid sudden PAR jumps; acclimate lighting over 2–3 weeks.

How does Acropora carduus typically grow, and how should I place it?

It encrusts tightly, then forms dense bottlebrush branches with short radial corallites. Place high with room for outward growth. Provide strong, chaotic flow (30–50x tank turnover) that sweeps the colony base to prevent detritus and STN. Avoid stagnant centers by not crowding nearby branches. Keep space from shade-casting neighbors and soft corals that release irritants; run carbon if mixed.

I’m seeing burnt tips but also some base recession—how do I pinpoint the trigger?

Burnt, stark-white tips with good base usually signal an alkalinity spike under high PAR. Verify test kit and target slow corrections. Base STN with normal tips often indicates low flow at the base, bacterial stress, or nutrient swings. Increase crossflow, siphon detritus, stabilize NO3/PO4, and consider a mild iodine dip. Rule out pests before making big chemistry changes.

What pests target this coral, and how can I detect them early?

AEFW leave oval bite marks and tissue roughness, often on shaded undersides; a baster blast may dislodge tan flatworms. Red bugs present as tiny orange specks, reducing polyp extension and color pop. Quarantine new frags, inspect under blue light with magnification, and use dips (e.g., Bayer/iodine) per protocol. After treatment, boost flow and stability to speed recovery.

TSA Green Dragon Acropora Coral

Acropora SPS

Overview

Green Dragon Acropora Coral shows bright green, tightly spaced branchlets with fine axial tips. Acropora carduus is a branching small-polyp stony coral that prefers strong light and high, turbulent water flow. It relies mainly on symbiotic algae for energy but can benefit from occasional small plankton or amino feedings, which may support faster growth and maintain color. Place high on stable rock with ample space from aggressive neighbors, and keep alkalinity and nutrients steady to prevent tissue loss.

Quick Facts

Care Difficult

Lighting High

Flow High

Placement High

Temperament Peaceful (2–3 inches spacing)

Recommended Parameters

Temp 76–80°F

pH 8.1–8.4

Salinity 1.025–1.026

Calcium 400–450 ppm

AlkAlkalinity 7.5–9 dKH

Magnesium 1280–1350 ppm

Feeding photosynthetic (primary), microplankton, rotifers, copepod nauplii, oyster eggs, coral-specific powdered foods (e.g., Reef-Roids), amino acid supplements

Care & Placement

Green Dragon Acropora Coral (Acropora carduus) thrives under strong, stable reef conditions. Target 250–350 PAR with gradual light acclimation (start lower or reduce intensity 20–30% for 1–2 weeks). Provide high, random flow (30–50x tank turnover) to keep tissue clean and prevent detritus buildup; oscillating or alternating pumps work well. Keep temperature 24–26°C (75–79°F), salinity 1.025–1.026 (35 ppt), pH 8.1–8.4, alkalinity 7.5–8.5 dKH (stable is more important than a specific number), calcium 420–460 ppm, magnesium 1300–1400 ppm, nitrate 2–10 ppm, and phosphate 0.02–0.08 ppm. Test weekly (or use automated monitors) and correct slowly; this species is sensitive to rapid swings. Feed sparingly 1–3x weekly with fine particulate foods (e.g., rotifers, reef powders) or amino acids to support color and growth, but avoid nutrient spikes.Place frags high on rockwork with strong, turbulent flow and at least 2–3 inches from other SPS; give 6+ inches from aggressive LPS with long sweepers. Mount upright on clean, stable plugs or rock; keep the base free of detritus and algae. Dip and inspect all new pieces for pests (AEFW, red bugs) and quarantine when possible. Signs of stress include paling or bleaching from excess light or sudden parameter shifts, and tissue recession from alkalinity swings or pests; respond by restoring stability, reducing light 10–20%, increasing flow around affected areas, and addressing pests promptly. For acclimation, match temperature and salinity, use a slow drip (30–60 minutes), and ramp light over 1–2 weeks. Frag healthy tips if rapid tissue loss occurs to preserve the strain.

FAQ

Frequently Asked Questions

About the TSA Green Dragon Acropora Coral

My Green Dragon Acropora is fading from neon green to olive—what’s the likely cause and fix?

Color shifts often track nutrient and spectrum balance. Aim for NO3 ~2–10 ppm and PO4 ~0.03–0.08 ppm; too low pale, too high brown. Strong blue/UV (420–470 nm) keeps greens vivid; reduce excess white. Maintain stable alkalinity (7.3–8.3 dKH). Trace balance matters—iron/manganese deficiencies mute green. Increase random flow and avoid sudden PAR jumps; acclimate lighting over 2–3 weeks.
How does Acropora carduus typically grow, and how should I place it?

It encrusts tightly, then forms dense bottlebrush branches with short radial corallites. Place high with room for outward growth. Provide strong, chaotic flow (30–50x tank turnover) that sweeps the colony base to prevent detritus and STN. Avoid stagnant centers by not crowding nearby branches. Keep space from shade-casting neighbors and soft corals that release irritants; run carbon if mixed.
I’m seeing burnt tips but also some base recession—how do I pinpoint the trigger?

Burnt, stark-white tips with good base usually signal an alkalinity spike under high PAR. Verify test kit and target slow corrections. Base STN with normal tips often indicates low flow at the base, bacterial stress, or nutrient swings. Increase crossflow, siphon detritus, stabilize NO3/PO4, and consider a mild iodine dip. Rule out pests before making big chemistry changes.
What pests target this coral, and how can I detect them early?

AEFW leave oval bite marks and tissue roughness, often on shaded undersides; a baster blast may dislodge tan flatworms. Red bugs present as tiny orange specks, reducing polyp extension and color pop. Quarantine new frags, inspect under blue light with magnification, and use dips (e.g., Bayer/iodine) per protocol. After treatment, boost flow and stability to speed recovery.

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TSA Green Dragon Acropora Coral

Overview

Quick Facts

Recommended Parameters

Care & Placement

Acropora