Why do my Armor of God Zoanthids shift from deep reds to duller tones under new lights?

This morph is highly spectrum-sensitive. Heavy blue/UV brings out the red/orange face and bright skirts, while whiter spectra wash them out. Keep PAR moderate (80–150) and avoid rapid intensity jumps—ramp over 2–3 weeks. Stable nutrients (nitrate 5–15 ppm, phosphate 0.03–0.1) maintain saturation; ultra-low nutrients drain color. A short photoperiod increase often helps more than cranking intensity.

They’re open but not spreading—what slows mat growth on this morph?

Armor of God tends to pause growth when detritus accumulates at the mat edge. Increase random flow to keep the base clean, and turkey-baste weekly. Keep alkalinity stable (7.8–8.6 dKH) and avoid big swings after water changes. A small bump in nitrate from near-zero to 5–10 ppm often restarts budding. Check for low iodine; a modest, tested dose can help, but avoid blind dosing.

How do I safely frag this morph without losing the pattern or causing “melt”?

Cut the mat between polyps, not through mouths. Use eye protection and gloves; Zoanthus can contain dangerous toxins. Make shallow, precise cuts on a clean board and rinse frags in fresh saltwater. Dip gently (low-strength povidone-iodine or a zoa-safe dip) for 2–3 minutes. Mount on clean plugs with gel glue, moderate flow, and lower light for a week. Stable nutrients prevent post-frag recession.

My colony stays closed after lights-on, then opens late—what’s the likely cause?

This morph often reacts to pest activity at dawn. Inspect at night with a red light for zoa-eating nudibranchs, sundial snails, or spiders near the skirt. Remove manually and follow with targeted dips over 10–14 days to catch hatch cycles. Also check for shadowing by algae at the mat edge; a gentle brush and improved flow usually restore punctual polyp extension.

Armor of God Zoanthids Coral

Beginner Coral Soft Coral Zoanthids

Overview

Armor of God Zoanthids Coral shows small button-like polyps with contrasting centers and short skirts. Zoanthus sp., a soft colonial polyp coral, does well under moderate light and gentle to moderate water flow. It is primarily photosynthetic with symbiotic algae, but occasional small meaty or planktonic foods can support faster growth and maintain color. Place on an isolated rock to manage spreading and keep space from aggressive neighbors.

Quick Facts

Care Easy

Lighting Low–Moderate

Flow Moderate, indirect

Placement Low–Mid

Temperament Semi-aggressive (2–3 inches spacing)

Recommended Parameters

Temp 76–82°F

pH 8.1–8.4

Salinity 1.025–1.026

Calcium 400–450 ppm

AlkAlkalinity 8–10 dKH

Magnesium 1250–1350 ppm

Feeding photosynthetic, microplankton, phytoplankton, zooplankton, rotifers, baby brine shrimp, powdered coral foods (e.g., Reef-Roids), marine snow

Care & Placement

Armor of God Zoanthids Coral (Zoanthus sp.) thrives with stable, moderate conditions. Provide moderate light (PAR ~80–150); acclimate to brighter tanks slowly with reduced intensity or placement in shade to avoid bleaching. Use moderate, indirect, random flow to keep detritus from settling without pinching polyps. They are photosynthetic but benefit from occasional small particulate foods (rotifers, reef roids) or amino supplements 1–2x/week; do not overfeed. Target water parameters: temperature 76–80°F (24–27°C), salinity 1.024–1.026 specific gravity, pH 8.1–8.4, alkalinity 8.0–9.5 dKH, calcium 380–450 ppm, magnesium 1250–1350 ppm, nitrate 2–10 ppm, phosphate 0.03–0.08 ppm. Test weekly with reliable kits, use a refractometer, and avoid rapid swings; this coral is sensitive to instability.Place frags low to mid in the tank on isolated rock “islands” to curb spreading. Space at least 2–3 inches from neighbors; they can overgrow slower corals but are not strong stingers. Avoid direct contact with long-sweeper LPS and watch for fish that may nip (some angels, butterflies). Acclimate with a 30–45 minute drip and dip for pests (zoa-eating nudibranchs, sundial snails). Common issues: closed polyps from pests, too little flow, or very low nutrients; bleaching from too much light; recession from salinity or alkalinity swings. Maintain gentle but steady nutrients, stable parameters, and clean flow paths. Handle with care—wear gloves and eye protection when fragging or scrubbing.

FAQ

Frequently Asked Questions

About the Armor of God Zoanthids Coral

Why do my Armor of God Zoanthids shift from deep reds to duller tones under new lights?

This morph is highly spectrum-sensitive. Heavy blue/UV brings out the red/orange face and bright skirts, while whiter spectra wash them out. Keep PAR moderate (80–150) and avoid rapid intensity jumps—ramp over 2–3 weeks. Stable nutrients (nitrate 5–15 ppm, phosphate 0.03–0.1) maintain saturation; ultra-low nutrients drain color. A short photoperiod increase often helps more than cranking intensity.
They’re open but not spreading—what slows mat growth on this morph?

Armor of God tends to pause growth when detritus accumulates at the mat edge. Increase random flow to keep the base clean, and turkey-baste weekly. Keep alkalinity stable (7.8–8.6 dKH) and avoid big swings after water changes. A small bump in nitrate from near-zero to 5–10 ppm often restarts budding. Check for low iodine; a modest, tested dose can help, but avoid blind dosing.
How do I safely frag this morph without losing the pattern or causing “melt”?

Cut the mat between polyps, not through mouths. Use eye protection and gloves; Zoanthus can contain dangerous toxins. Make shallow, precise cuts on a clean board and rinse frags in fresh saltwater. Dip gently (low-strength povidone-iodine or a zoa-safe dip) for 2–3 minutes. Mount on clean plugs with gel glue, moderate flow, and lower light for a week. Stable nutrients prevent post-frag recession.
My colony stays closed after lights-on, then opens late—what’s the likely cause?

This morph often reacts to pest activity at dawn. Inspect at night with a red light for zoa-eating nudibranchs, sundial snails, or spiders near the skirt. Remove manually and follow with targeted dips over 10–14 days to catch hatch cycles. Also check for shadowing by algae at the mat edge; a gentle brush and improved flow usually restore punctual polyp extension.