How do I keep the “Frozen Apple” colors from washing out or browning in Zoanthus sp.?

Maintain moderate PAR (80–150) with strong blue spectrum (420–470 nm). Sudden high white light can mute greens and icy rings. Acclimate over 2–3 weeks using a screen or ramping intensity. Keep nutrients measurable but modest (NO3 ~5–15 ppm, PO4 ~0.03–0.1 ppm). Stable alkalinity and low film algae on the mat help polyp extension and color pop.

Why do my Frozen Apple polyps stay small and “pinched” after a move?

This morph often sulks after light/flow changes. Provide brisk, indirect flow that ripples skirts without blasting the mat. Check for rapid swing in salinity or alkalinity; minor corrections over days are better than instant fixes. Shade slightly and increase light slowly. Polyps usually regain size within 1–2 weeks once stability returns.

What pests target this morph, and how do I differentiate damage?

Nibbled skirts and bare centers suggest zoa-eating nudibranchs; look at night for camouflaged adults and egg spirals. Missing polyps with neat holes point to sundial snails; jagged mat damage hints at zoa spiders. Dip new frags (iodine or Furan-2 for pox), manually remove adults/eggs, and consider a pest-hunting wrasse. Repeat inspections for two weeks.

Do Frozen Apple Zoanthids need target feeding, or will it hurt growth?

They’re largely photosynthetic and thrive without heavy feeding. Occasional fine-particulate foods (reef roids, oyster eggs) can boost growth, but overfeeding fuels film algae on the mat, causing retraction. Feed sparingly once weekly with solid export (skimming, floss). Keep flow up after feeding so particles don’t settle between polyps.

TSA Frozen Apple Zoanthids Coral

Beginner Corals Zoanthids Soft Coral

Overview

Frozen Apple Zoanthids Coral shows small button polyps with bright green centers and pale skirts. Zoanthus sp. is a soft, colonial polyp; keep under moderate light and moderate, indirect flow. It is photosynthetic via symbiotic algae but will take small meaty foods or coral foods, supporting faster growth and stable color. Place on a separate rock with space, as colonies can spread and crowd nearby corals.

Quick Facts

Care Easy

Lighting Low–Moderate

Flow Moderate

Placement Mid–Low

Temperament Semi-aggressive (2–3 inches spacing; may overgrow neighbors)

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, fine zooplankton, rotifers, cyclops, coral-specific powdered foods, amino acid supplements

Care & Placement

Frozen Apple Zoanthids Coral (Zoanthus sp.) thrive with stable, moderate conditions and will spread readily when happy. Provide moderate light (PAR ~80–150); start low or shaded and move up over 2–3 weeks to avoid bleaching. Blue spectrum brings out color, but too much intensity causes shrinking or paling. Aim for moderate, indirect flow to keep detritus off the mat and discourage algae or film; avoid direct blasts that keep polyps closed. Target-feed once or twice weekly with fine zooplankton or coral foods; feed lightly to maintain good polyp extension and growth. Keep temperature 76–80°F, salinity 1.025–1.026, pH 8.1–8.4, alkalinity 8.0–9.5 dKH, calcium 400–450 ppm, magnesium 1250–1350 ppm, nitrate 2–10 ppm, and phosphate 0.03–0.1 ppm. Test weekly, use a refractometer, and maintain an auto top-off to reduce swings.Place colonies low to mid level on isolated rock “islands” to control spread, with 2–3 inches of space from neighbors. Zoanthids are peaceful but can overgrow slower corals; keep them away from strong stingers (e.g., torch, galaxea). Drip acclimate 30–45 minutes and reduce light for the first week. Dip new frags to prevent pests (nudibranchs, sundial snails, zoa pox); handle with gloves and eye protection. Troubleshooting: closed polyps often signal pests, irritation from sand or high flow, or rapid parameter changes; pale color suggests too much light or low nutrients; melting mats indicate instability—perform small, frequent water changes and correct parameters.

FAQ

Frequently Asked Questions

About the TSA Frozen Apple Zoanthids Coral

How do I keep the “Frozen Apple” colors from washing out or browning in Zoanthus sp.?

Maintain moderate PAR (80–150) with strong blue spectrum (420–470 nm). Sudden high white light can mute greens and icy rings. Acclimate over 2–3 weeks using a screen or ramping intensity. Keep nutrients measurable but modest (NO3 ~5–15 ppm, PO4 ~0.03–0.1 ppm). Stable alkalinity and low film algae on the mat help polyp extension and color pop.
Why do my Frozen Apple polyps stay small and “pinched” after a move?

This morph often sulks after light/flow changes. Provide brisk, indirect flow that ripples skirts without blasting the mat. Check for rapid swing in salinity or alkalinity; minor corrections over days are better than instant fixes. Shade slightly and increase light slowly. Polyps usually regain size within 1–2 weeks once stability returns.
What pests target this morph, and how do I differentiate damage?

Nibbled skirts and bare centers suggest zoa-eating nudibranchs; look at night for camouflaged adults and egg spirals. Missing polyps with neat holes point to sundial snails; jagged mat damage hints at zoa spiders. Dip new frags (iodine or Furan-2 for pox), manually remove adults/eggs, and consider a pest-hunting wrasse. Repeat inspections for two weeks.
Do Frozen Apple Zoanthids need target feeding, or will it hurt growth?

They’re largely photosynthetic and thrive without heavy feeding. Occasional fine-particulate foods (reef roids, oyster eggs) can boost growth, but overfeeding fuels film algae on the mat, causing retraction. Feed sparingly once weekly with solid export (skimming, floss). Keep flow up after feeding so particles don’t settle between polyps.