The EcoTech Marine Multi-Light RMS (Radion Mounting System) Rail is a heavy-duty architectural aluminum horizontal track designed to support multiple Radion LED fixtures over a single aquarium. Engineered to serve as the rigid cross-beam of EcoTech's modular multi-light network, it allows users to position, slide, and rotate individual lights to eliminate shadows and optimize PAR distribution.

The system places Radion fixtures at an optimal fixed height of approximately 7 inches (18 cm) above the glass rim. The extruded track profile is hollowed out to serve as an internal cable routing channel, allowing power cords to enter near the fixture sliders and run entirely inside the rail to exit discreetly at the tank edges.

Understanding the Three-Part Modular System

The Multi-Light RMS is a strictly modular architecture. Buying a track alone will not mount your lights; you must assemble the three mandatory independent components:

Part A (The Structural Support): Either a set of Multi-Light RMS Arms that clamp onto the right and left vertical glass panels, or an RMS Hanging Kit that substitutes the arms for ceiling-suspended steel wires.
Part B (The Rail/Track): The horizontal aluminum profile (detailed below) that matches the length of your display tank.
Part C (The Light Slides): Individual plastic-and-metal mounting brackets (available in dedicated XR15 or XR30 sizes) that fit into the rail tracks. A single track can mix and match XR15 and XR30 slides simultaneously.

Technical Specification & Sizing Matrix

To accommodate intermediate or non-standard custom tanks, each structural rail provides exactly 10 inches (25.4 cm) of telescoping adjustment range. The track slides forward or backward across the mounting arms, ensuring a clean, secure fit even if your glass dimensions do not match standard commercial layouts:

Track Model Length	Official Part Number	Ideal Aquarium Width / Span Coverage	Compatible Base Tank Profiles
20.5 Inches (52 cm)	XR703-0205	18.5" to 28.5" (47.0 cm – 72.4 cm)	2-Foot Nano & Small Fragment Tanks
30.5 Inches (77 cm)	XR703-0305	28.5" to 38.5" (72.4 cm – 97.8 cm)	Standard 30-Inch & 3-Foot Shallow Tanks
40.5 Inches (102 cm)	XR703-0405	38.5" to 48.5" (97.8 cm – 123.2 cm)	Standard 4-Foot Tanks (e.g., 75 / 90 Gallon)
50.5 Inches (128 cm)	XR703-0505	48.5" to 58.5" (123.2 cm – 148.6 cm)	Large 4-Foot Displays & Deep 5-Foot Tanks
60.5 Inches (153 cm)	XR703-0605	58.5" to 68.5" (148.6 cm – 174.0 cm)	Standard 5-Foot Layouts
70.5 Inches (179 cm)	XR703-0705	68.5" to 78.5" (174.0 cm – 199.4 cm)	Standard 6-Foot Tanks (e.g., 180 / 210 Gallon)
80.5 Inches (204 cm)	XR703-0805	78.5" to 88.5" (199.4 cm – 224.8 cm)	Large 6-Foot & 7-Foot Custom System Spans
90.5 Inches (230 cm)	XR703-0905	88.5" to 98.5" (224.8 cm – 250.2 cm)	Heavy-Duty 8-Foot Extra-Large Displays

Radion

EcoTech Marine Multi-Light Rms Rail

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