Exosphere Zoanthids Coral

Exosphere Zoanthids Coral

Overview

Exosphere Zoanthids Coral displays tight mats of small button-like polyps with contrasting centers and rims. Classified as Zoanthus sp., it is a soft colonial polyp coral that thrives under moderate light and low to moderate, indirect flow. It is primarily photosynthetic via symbiotic algae but accepts occasional small particulate foods, which can improve growth and maintain color. Place on isolated rock to manage spreading, and keep space from aggressive stinging corals.

Quick Facts

Care Easy
Lighting Low–Moderate
Flow Moderate
Placement Mid–Low
Temperament Peaceful to semi-aggressive (2–3 inches spacing)

Recommended Parameters

Temp 76–82°F
pH 8.1–8.4
Salinity 1.025–1.026
Calcium 380–450 ppm
AlkAlkalinity 8–10 dKH
Magnesium 1250–1350 ppm
Feeding photosynthetic (primary), microplankton, phytoplankton, very fine zooplankton, powdered coral foods, marine snow

Care & Placement

Exosphere Zoanthids Coral (Zoanthus sp.) thrives under stable, nutrient-lean but not sterile conditions. Provide moderate light (PAR 60–150) with slow ramp-ups to avoid bleaching; signs of too little light include stretching toward the source, while washed-out colors suggest excess light. Aim for moderate, random flow to keep polyps clean and prevent detritus buildup without pinning them closed. Target feed fine foods (zooplankton, powdered coral foods) 1–2 times weekly for better growth, though they photosynthesize well. Keep temperature 24–26°C/75–79°F, salinity 1.024–1.026, pH 8.1–8.4, alkalinity 8–9.5 dKH, calcium 400–450 ppm, magnesium 1250–1350 ppm, nitrate 2–10 ppm, and phosphate 0.02–0.08 ppm. Test weekly; use a refractometer for salinity and adjust slowly.Place low to mid in the tank, starting lower and moving up over 1–2 weeks. Mount on an isolated rock “island” to control spread and leave 2–3 inches from neighbors; avoid contact with aggressive LPS sweepers. Generally peaceful, but can overgrow slower corals. Acclimate with a 30–60 minute drip, reduce light intensity initially, and dip new frags to remove pests (nudibranchs, sundial snails, zoa pox). If polyps stay closed, check for pests, unstable parameters, or too much/too little flow. Bleaching points to rapid light change; recession can follow starvation or very low nutrients—slightly raise nitrate/phosphate and resume gentle feeding. Handle with gloves/eye protection and maintain good ventilation when fragging. Stable conditions and routine observation are key.

FAQ

Frequently Asked Questions

About the Exosphere Zoanthids Coral

  • Why do my Exosphere Zoanthids suddenly stall after weeks of fast spreading?
    They often pause to thicken the mat and build energy reserves. Maintain a gentle nutrient floor (nitrate 2–10 ppm, phosphate 0.02–0.1 ppm), steady alkalinity (7.5–9 dKH), and slightly increase indirect flow. If the edge is overgrown with detritus, gently turkey-baste weekly. Light trimming of the mat edge can redirect growth; avoid cutting polyps.
  • How can I keep Exosphere colors from washing out or browning under LEDs?
    Target moderate PAR (80–180) and emphasize 420–450 nm. Too much white or UV can mute fluorescence or cause skirt retraction. Acclimate 10–20% intensity changes over 1–2 weeks. Stable nutrients prevent brown zoox spikes; ultra-low nutrients often fade neon. Occasional fine-particulate feeds help, but prioritize consistency over heavy feeding.
  • What pests or diseases uniquely trouble Zoanthus sp., and how do I respond?
    Watch for zoa-eating nudibranchs, their spiral eggs, sundial snails, and “zoa spiders.” Inspect after lights out. Use targeted dips (e.g., iodine-based) and manually remove egg clusters. For zoa pox (tan pustules), Furan-2 baths are widely used; follow product guidance and isolate affected frags. Improve flow and cleanliness to prevent detritus pockets where pests hide.
  • Why do nearby corals cause periodic closing or slow extension?
    Zoanthus can react to chemical cues and mucus from neighbors. Provide space from aggressive LPS sweeper tentacles and fast-growing softies. Run fresh activated carbon and change it regularly to reduce allelopathic stress. Brisk, randomized flow helps disperse chemicals and debris. If conflict persists, isolate on a dedicated rock island to contain spread.