Why does my Hologram Hammer’s sheen look muted under my LEDs, and can I get the shimmer back?

The holographic sheen shows best under balanced blue-violet spectrum (around 420–460 nm) with moderate PAR (100–150). Oversaturated royal blue can wash out reflective pigments; intense white can bleach them. Try a gentle ramp with more violet/blue, reduce white channels mid-day, and stabilize nutrients (nitrate 5–15 ppm, phosphate 0.03–0.1). Give it two weeks—pigments rebound slowly.

My Fimbriaphyllia ancora is receding along the “ridges.” Is this flow, lighting, or chemistry?

Wall hammers often recede where tissue bridges sharp skeleton. Common triggers: direct laminar flow causing micro-tears, sudden alkalinity swings, or shadowed ridges under high PAR edges. Shift to indirect, pulsing flow, keep alk 8–9 dKH with <0.2 dKH daily swing, and tilt the colony slightly to even out light. Inspect for brown jelly; if present, siphon, iodine dip, and increase aeration.

Are clowns or shrimps safe to host in this coral?

Occasional clownfish or cleaner shrimp “visits” are fine, but persistent hosting can stress tissue, especially during acclimation or after fragging. Look for excessive mucus or deflation cycles. Provide an alternative host (e.g., a large leather or anemone substitute) and raise flow slightly to discourage lingering. Nighttime sweeper tentacles can also sting intruders—monitor for nipped tips or sudden retraction.

My hammer inflates during the day but deflates and exposes skeleton at night—normal or a stress sign?

Mild nightly deflation is normal as it shifts energy and extends short sweepers. Sharp, prolonged deflation with gaping mouths suggests stress: temperature dips, pH swings, or pests (e.g., flatworms). Check night pH and temp stability, run a brief red-light inspection, and consider a targeted amino/iodine dip if tissue appears irritated. Adjust flow to a gentle, rhythmic sway.

Hologram Hammer Coral

Q: Are clowns or shrimps safe to host in this coral?

Occasional clownfish or cleaner shrimp “visits” are fine, but persistent hosting can stress tissue, especially during acclimation or after fragging. Look for excessive mucus or deflation cycles. Provide an alternative host (e.g., a large leather or anemone substitute) and raise flow slightly to discourage lingering. Nighttime sweeper tentacles can also sting intruders—monitor for nipped tips or sudden retraction.

Q: My hammer inflates during the day but deflates and exposes skeleton at night—normal or a stress sign?

Mild nightly deflation is normal as it shifts energy and extends short sweepers. Sharp, prolonged deflation with gaping mouths suggests stress: temperature dips, pH swings, or pests (e.g., flatworms). Check night pH and temp stability, run a brief red-light inspection, and consider a targeted amino/iodine dip if tissue appears irritated. Adjust flow to a gentle, rhythmic sway.

Euphyllia LPS Hammers

Overview

Hologram Hammer Coral displays thick, hammer-shaped tentacle tips with a meandering wall growth form. Fimbriaphyllia ancora is a large-polyp stony coral that prefers moderate lighting and gentle to moderate, indirect water flow. It relies on symbiotic algae for most nutrition but accepts occasional small meaty foods, which can support growth and fuller polyp expansion. Place it with room for expansion and keep clear of nearby corals, as its sweeper tentacles can sting neighbors.

Quick Facts

Care Moderate

Lighting Moderate

Flow Moderate, indirect

Placement Mid–Low

Temperament Aggressive (sweeper tentacles to 6–8 inches; provide ample spacing)

Recommended Parameters

Temp 77–80°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, mysis shrimp, enriched brine shrimp, finely chopped seafood, zooplankton, microplankton, powdered coral foods

Care & Placement

Hologram Hammer Coral (Fimbriaphyllia ancora) prefers stable, moderate conditions. Provide moderate light at 80–150 PAR; too much light can bleach, too little flattens color and polyp extension. Flow should be low to moderate with a gentle, rhythmic sway; harsh, direct flow can tear tissue and invite brown jelly disease. Feed small meaty foods (mysis, finely chopped shrimp) or fine coral foods 1–2 times weekly; spot-feed after lights dim for best capture. Maintain temperature 76–79°F, salinity 1.025–1.026, pH 8.1–8.4, alkalinity 8.0–9.5 dKH, calcium 400–450 ppm, magnesium 1280–1400 ppm, nitrate 2–10 ppm, phosphate 0.02–0.08 ppm. Test weekly, keep swings minimal, and confirm salinity with a calibrated refractometer.Place low to mid in the tank on a stable ledge with room for tissue to expand; avoid sharp rock edges. Start on the sandbed and move up slowly for light acclimation, or use a screen. Allow 6–8 inches of space from neighbors; sweeper tentacles can extend several inches at night. Semi-aggressive: safest with other LPS at a distance; even related species can sting. Drip acclimate 30–45 minutes, dip if damaged (iodine-based), and handle by the skeleton, not the flesh. If you see recession, check alkalinity stability, confirm gentle flow, and siphon detritus; for paling, lower PAR and increase feeding. Stability and moderate nutrients are key to steady growth and full, hammering extension.

FAQ

Frequently Asked Questions

About the Hologram Hammer Coral

Why does my Hologram Hammer’s sheen look muted under my LEDs, and can I get the shimmer back?

The holographic sheen shows best under balanced blue-violet spectrum (around 420–460 nm) with moderate PAR (100–150). Oversaturated royal blue can wash out reflective pigments; intense white can bleach them. Try a gentle ramp with more violet/blue, reduce white channels mid-day, and stabilize nutrients (nitrate 5–15 ppm, phosphate 0.03–0.1). Give it two weeks—pigments rebound slowly.
My Fimbriaphyllia ancora is receding along the “ridges.” Is this flow, lighting, or chemistry?

Wall hammers often recede where tissue bridges sharp skeleton. Common triggers: direct laminar flow causing micro-tears, sudden alkalinity swings, or shadowed ridges under high PAR edges. Shift to indirect, pulsing flow, keep alk 8–9 dKH with <0.2 dKH daily swing, and tilt the colony slightly to even out light. Inspect for brown jelly; if present, siphon, iodine dip, and increase aeration.
Are clowns or shrimps safe to host in this coral?

Occasional clownfish or cleaner shrimp “visits” are fine, but persistent hosting can stress tissue, especially during acclimation or after fragging. Look for excessive mucus or deflation cycles. Provide an alternative host (e.g., a large leather or anemone substitute) and raise flow slightly to discourage lingering. Nighttime sweeper tentacles can also sting intruders—monitor for nipped tips or sudden retraction.
My hammer inflates during the day but deflates and exposes skeleton at night—normal or a stress sign?

Mild nightly deflation is normal as it shifts energy and extends short sweepers. Sharp, prolonged deflation with gaping mouths suggests stress: temperature dips, pH swings, or pests (e.g., flatworms). Check night pH and temp stability, run a brief red-light inspection, and consider a targeted amino/iodine dip if tissue appears irritated. Adjust flow to a gentle, rhythmic sway.