Why does my RR Garden of Eden Tenuis lose rainbow tones and turn pastel under strong LEDs?

Rapid pastel shift often stems from high PAR paired with ultra-low nutrients. Aim for moderate, steady NO3 (5–15 ppm) and PO4 (0.03–0.08 ppm), then slowly ramp violet/UV (380–430 nm) rather than white intensity. Ensure high, randomized flow to prevent base shading and detritus. If tips pale while bases stay colored, reduce PAR 10–15% and increase feeding frequency slightly.

My tenuis shows tip burn while alk tests fine—what else should I check?

Tip burn occurs when PAR and alkalinity outpace available nutrients. Stable alk at 7.5–8.5 dKH works best with non-zero NO3/PO4. Verify potassium (target ~400–420 ppm) for blue/violet retention and iron for greens. Avoid big water chemistry swings—dose traces slowly. Improve chaotic flow; laminar blasts can worsen necrosis at tips and bases.

What’s a telltale sign of pests on RR Garden of Eden Tenuis, and how should I respond?

Crescent bite marks and patchy polyp retraction point to Acropora-eating flatworms; red bugs appear as tiny orange dots on polyps. Remove and dip the colony, turkey-baste daily to dislodge eggs, and quarantine. Add a pest-hunting wrasse for prevention. If tissue loss starts, frag healthy margins ahead of the recession and stabilize nutrients and flow.

The green base is dull but pink tips look fine—what adjustment helps color balance?

Dull greens often indicate low iron or excess white spectrum. Dose trace iron conservatively and boost violet/royal (405–470 nm) relative to cool white. Keep PO4 detectable; zeroed phosphate mutes greens. Avoid aggressive carbon use that oversharpens water and washes color. Reassess flow to eliminate detritus shading at the base for even pigment expression.

RR Garden of Eden Tenuis Acropora Coral

Acropora SPS

Overview

RR Garden of Eden Tenuis Acropora Coral shows tightly spaced axial corallites and branching tips with fine polyp extension. Acropora tenuis is a small-polyp stony branching coral that prefers strong lighting and high, turbulent water flow. It is primarily photosynthetic via symbiotic algae, but occasional broadcast feeding of fine plankton can support growth and color. Place high on stable rockwork with space from aggressive neighbors, and keep alkalinity stable with low nutrients to avoid tissue loss.

Quick Facts

Care Difficult

Lighting High

Flow High

Placement High

Temperament Semi-aggressive (2–4 inches spacing)

Recommended Parameters

Temp 76–80°F

pH 8.1–8.4

Salinity 1.025–1.026

Calcium 420–450 ppm

AlkAlkalinity 7.5–9 dKH

Magnesium 1280–1350 ppm

Feeding photosynthetic (primary), microplankton, zooplankton, rotifers, copepods, cyclops, oyster eggs, coral-specific powdered foods, amino acid supplements

Care & Placement

RR Garden of Eden Tenuis Acropora Coral (Acropora tenuis) is an SPS that rewards stable, clean water and strong light/flow. Aim for 250–400 PAR with a blue-heavy spectrum; acclimate to light by starting lower or using screen and increasing intensity over 2–3 weeks to avoid bleaching. Provide strong, random flow to keep tissue clean and prevent detritus buildup; alternate pumps or gyre patterns work well. Target feed fine particulate foods (e.g., reef roids, rotifers) and amino acids 1–2x weekly; not required but can improve coloration and growth if nutrients remain controlled. Ideal parameters: temp 24–26°C (75–79°F), salinity 1.025–1.026, pH 8.1–8.4, alkalinity 8–9.5 dKH (avoid swings), calcium 420–460 ppm, magnesium 1300–1400 ppm, nitrate 2–10 ppm, phosphate 0.02–0.08 ppm. Test alk daily when new and at least 2–3x weekly thereafter; use reliable kits or send periodic ICP tests.Place in the upper third of the tank on stable rock with room for branching; maintain 2–3+ inches from neighbors. Keep away from aggressive LPS sweepers and soft corals known for chemical warfare; run carbon and ensure good export. Dip and quarantine to prevent pests like AEFW and red bugs. Mount securely with epoxy/gel to prevent shading or breaks. Watch for paling (too much light/too little nutrients) and tissue recession (often due to parameter swings or pests). If issues arise, stabilize alk/temp, verify salinity, increase flow, and reduce light 20–30% temporarily while correcting root causes. Maintain stability above all.

FAQ

Frequently Asked Questions

About the RR Garden of Eden Tenuis Acropora Coral

Why does my RR Garden of Eden Tenuis lose rainbow tones and turn pastel under strong LEDs?

Rapid pastel shift often stems from high PAR paired with ultra-low nutrients. Aim for moderate, steady NO3 (5–15 ppm) and PO4 (0.03–0.08 ppm), then slowly ramp violet/UV (380–430 nm) rather than white intensity. Ensure high, randomized flow to prevent base shading and detritus. If tips pale while bases stay colored, reduce PAR 10–15% and increase feeding frequency slightly.
My tenuis shows tip burn while alk tests fine—what else should I check?

Tip burn occurs when PAR and alkalinity outpace available nutrients. Stable alk at 7.5–8.5 dKH works best with non-zero NO3/PO4. Verify potassium (target ~400–420 ppm) for blue/violet retention and iron for greens. Avoid big water chemistry swings—dose traces slowly. Improve chaotic flow; laminar blasts can worsen necrosis at tips and bases.
What’s a telltale sign of pests on RR Garden of Eden Tenuis, and how should I respond?

Crescent bite marks and patchy polyp retraction point to Acropora-eating flatworms; red bugs appear as tiny orange dots on polyps. Remove and dip the colony, turkey-baste daily to dislodge eggs, and quarantine. Add a pest-hunting wrasse for prevention. If tissue loss starts, frag healthy margins ahead of the recession and stabilize nutrients and flow.
The green base is dull but pink tips look fine—what adjustment helps color balance?

Dull greens often indicate low iron or excess white spectrum. Dose trace iron conservatively and boost violet/royal (405–470 nm) relative to cool white. Keep PO4 detectable; zeroed phosphate mutes greens. Avoid aggressive carbon use that oversharpens water and washes color. Reassess flow to eliminate detritus shading at the base for even pigment expression.

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