top of page
Neptune Systems GRO Macroalgae Light

Neptune Systems GRO Macroalgae Light

SKU: T1028

The Neptune Systems GRO Macroalgae Light is a compact 20W LED designed for effective macroalgae growth, particularly popular in refugiums for nutrient control in reef aquariums. Featuring 84 LEDs in four colors and two key spectrum ranges, it maximizes photosynthesis for optimal growth. With a distributed LED design, it eliminates light hotspots, preventing macroalgae burn. Its IP64 water resistance allows placement close to water, reducing nuisance algae growth. Plugging directly into DC24 ports on EnergyBar832 or 1Link modules, it covers refugium areas up to 18”x24” and operates standalone with an optional power supply. Compatible with all Apex models, it includes a Flat Bracket Mount (GRO-F) for easy installation.

Neptune Systems GRO Macroalgae Light


Some of the most successful reef aquariums employ the use of a macroalgae-filled growth area or refugium for the purpose of nutrient control.


The GRO is a specialized, 20W LED light designed to grow many types of common macroalgaes (i.e. Chaetomorpha) using a specialized light spectrum which maximizes photosynthesis. It plugs directly into any available DC24 port in your Apex ecosystem, or alternatively, it can also be run completely standalone.



  • Compact LED grow light with 84 LEDs in four colors, two key spectrum ranges for optimal macroalgae growth

  • Large, flat area of illumination promotes better growth as it creates a much more even spread than single, spotlight-style lights.

  • Distributed LED design means no light hotspots that can burn the macroalgae

  • Less light spillage – IP64 water resistance means it can be placed very close to water — reducing the growth of nuisance algae elsewhere

  • Two focused wavelength bands (455-460nm and 620-670nm) for maximum algae photosynthesis

  • Covers a refugium area up to 18”x24”

  • Plugs directly into DC24 connection on an EnergyBar832 or a 1Link module.

  • Dimensions:  8.7″ x 6.1″ x 1.4″ (light panel itself less than 1″ high)

  • Works with any Apex model, including the Apex Classic family.

  • Operates standalone, without an Apex, with the purchase of an optionally available power supply.

  • Includes Flat Bracket Mount (GRO-F)


More Information

bottom of page