Dive Deeper: Choosing and Placing a Radion
EcoTech Marine Radion fixtures pair a wide multi-channel LED array with Mobius app control, giving you full spectral shaping, acclimation ramps, weather effects and scheduling. The G6 generation widened the spectrum and improved colour blending over G5, which mostly shows up as better coral colouration and less disco-ball shadowing at the sand bed.
XR30 vs. XR15
XR30 G6 — the full-size fixture, designed for tanks 24 inches deep and up and covering roughly a 24" × 24" footprint at typical mounting height. This is the right choice for standard 4-foot and 6-foot displays, usually two or three fixtures across.
XR15 G6 — the compact fixture, covering roughly 18" × 18". Right for nano and frag systems, and often the better answer on a wide shallow tank where three XR15s give more even spread than two XR30s.
Pro vs. Blue — Pro fixtures carry the full channel set including additional whites and reds for a broader visual spectrum. Blue fixtures weight harder toward the blue and violet channels that drive coral fluorescence. Most SPS keepers run Blue; mixed reefs and people who want a whiter tank tend to prefer Pro.
Mounting Options
| Mount | Use case |
|---|
| RMS Tank Mount | Rimless or rimmed tanks, adjustable height and tilt |
| RMS Slide Mount | Adding fixtures to an existing RMS rail |
| Multi-Light RMS Track (20.5"–90.5") | Two or more fixtures on one rigid rail |
| Premium LED Hanging Kit | Ceiling-suspended, cleanest look |
| XR717 RMS Hanging Kit | Suspending an RMS track assembly |
PAR, Height and Acclimation
The most common Radion mistake is running new fixtures too hot too soon. Corals coming from a shop or another system are acclimated to different intensity and spectrum, and a G6 at 60% will bleach them in a week. Start low — 25–35% intensity — and ramp over four to six weeks using Mobius acclimation mode, and take PAR readings at the coral, not at the surface.
Mounting height changes everything. A fixture at 8 inches produces intense, tight coverage with hard shadows; at 12–14 inches you get better blending and a wider footprint at lower peak PAR. For most reef tanks, higher and slightly hotter beats low and dim.
Upgrades Worth Considering
High-Intensity Lens Kits narrow the beam for deeper tanks and higher peak PAR. Diffuser upgrades do the opposite, softening shadows and improving blending on shallow tanks. The MXM Mobius module adds wireless control to older fixtures. G4–G6 extension cables let you place the power supply away from the canopy.
Related Collections
Compare other reef lighting from Kessil and Reef Breeders, pair a Radion with aquarium controllers, or browse all saltwater aquarium supplies.
