Chihiros WRGB II Slim 90

The Chihiros WRGB II Slim 90 is a high-performance LED aquarium light designed for planted aquariums, combining strong plant-growing power with an ultra-slim and modern design. Built with Chihiros’ advanced WRGB LED technology, this fixture delivers a full-spectrum light that enhances aquatic plant growth while making fish and aquascapes appear vivid and natural.

Unlike conventional aquarium lights that rely mainly on white LEDs, the WRGB system uses a carefully balanced combination of red, green, and blue LEDs. This technology produces a richer spectrum that intensifies plant coloration, especially for red and orange plants, while maintaining healthy and balanced growth across the entire aquarium. Greens appear deeper and more vibrant, while fish display their natural colors with exceptional clarity.

The WRGB II Slim series was developed to provide the well-known performance of the WRGB II lighting line in a lighter and more compact fixture. The WRGB II Slim 90 is specifically designed for aquariums around 90 cm (36 inches) in length, making it an ideal lighting solution for many medium to large planted tanks and aquascaping layouts.

One of the most powerful features of this light is its smart control through the My Chihiros App. With the app, aquarists can fully customize lighting intensity, adjust RGB color balance, and create detailed lighting schedules directly from their smartphone. This allows users to fine-tune the spectrum and brightness according to the needs of different plant species and aquascaping styles.

The app also enables sunrise and sunset simulations, gradually increasing and decreasing brightness throughout the day. This creates a natural lighting cycle that helps reduce stress for fish while enhancing the visual experience of the aquarium.

Despite its slim and elegant profile, the WRGB II Slim 90 provides strong PAR output, capable of supporting a wide range of aquatic plants. From carpeting plants like Hemianthus callitrichoides to demanding red stem plants such as Rotala and Ludwigia, this light can sustain lush and vibrant planted aquariums when paired with proper CO₂ injection and nutrient dosing.

The fixture is built with a high-quality aluminum body that functions as an efficient heat sink, ensuring stable LED performance and a long operational lifespan. The included mounting legs allow the light to sit neatly on the edges of rimless aquariums, preserving the clean and minimal aesthetic that aquascapers value.

Its slim profile keeps the focus on the aquascape itself, making the lighting system nearly invisible while delivering powerful illumination across the entire tank.

For aquascapers looking for a powerful yet elegant lighting solution for a 90 cm planted aquarium, the Chihiros WRGB II Slim 90 offers the perfect combination of performance, control, and modern design. Whether you are creating a nature aquarium, a dense planted aquascape, or a vibrant display tank, this light provides the spectrum and flexibility needed to achieve stunning results.