Acropora horrida is a highly sought-after small polyp stony (SPS) coral known for its distinctive robust branches and intricate growth patterns. This extra large specimen offers a dramatic focal point for mature reef tanks, showcasing vibrant colours under appropriate lighting.
Lighting Requirements: Acropora horrida thrives under strong, high-intensity lighting such as metal halide, T5, or high-quality LED systems. Aim for PAR levels between 250-400 µmol/m²/s to support healthy growth and vibrant pigmentation.
Water Flow: Provide moderate to strong, turbulent water flow to mimic natural reef conditions. This helps prevent detritus accumulation and promotes optimal gas exchange and nutrient delivery.
Placement: Position this coral higher in the tank to ensure it receives adequate light and water movement. Maintain sufficient spacing from neighbouring corals to reduce aggression and allow for healthy expansion.
Care Level: Due to its sensitivity to water quality and lighting, Acropora horrida is best suited for experienced aquarists. Stable parameters with low nutrients, consistent alkalinity, calcium, and magnesium levels are essential.
Compatibility and Reef Safety: This coral is reef safe with adequate spacing, as it can engage in chemical warfare and overgrow nearby corals if placed too closely.
Diet: Primarily photosynthetic via symbiotic zooxanthellae, but benefits from occasional feeding of fine particulate foods such as coral foods or phytoplankton to support growth.
Origin: Not Provided.
Maximum Size: Can grow to substantial colony sizes depending on tank conditions, often reaching 20-30 cm or more in mature systems.
Minimum Tank Size: Recommended for tanks of 100 litres or larger to provide stable water parameters and adequate space.



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