The EcoTech Radion G6 Series has quickly become one of the most popular reef lighting systems on the market. With improved HEI2 optics, enhanced spread, powerful spectrum control, and seamless Mobius integration, the G6 provides reef keepers with everything needed to grow thriving corals while achieving stunning colouration.
However, owning a Radion G6 is only half the equation. To unlock its full potential, you need to choose the right spectrum, intensity, photoperiod, and schedule for the specific corals in your aquarium.
In this guide, we’ll cover the best Radion G6 settings for SPS, LPS, soft corals, and mixed reefs, helping you maximise growth, fluorescence, and long-term reef health. (Charterhouse Aquatics)
Understanding the Radion G6 Range
EcoTech currently offers two primary G6 spectrum options:
Radion G6 Blue
Designed around the highly popular AB+ spectrum profile, the G6 Blue delivers enhanced blue, violet, and UV output that promotes coral fluorescence and creates the vibrant appearance many reef hobbyists love. (Bulk Reef Supply)
Radion G6 Pro
The G6 Pro offers a broader full-spectrum output, including additional white, red, and green channels for a more natural daylight appearance while still maintaining excellent coral growth potential. (Charterhouse Aquatics)
The good news is that both models are capable of growing virtually any coral species when properly configured.
Why Light Settings Matter
Corals rely on photosynthetic zooxanthellae algae for much of their energy.
The right lighting setup influences:
- Coral growth rates
- Colour development
- Fluorescence
- Polyp extension
- Nutrient uptake
- Overall coral health
Too much light can lead to bleaching, while insufficient light may result in poor growth and dull colours.
Finding the sweet spot is key.
The Most Popular Radion Spectrum: AB+
When discussing Radion settings, one profile dominates the conversation:
CoralLab AB+
AB+ remains one of the most widely used and scientifically tested reef lighting profiles available. EcoTech’s CoralLab team developed this spectrum specifically to maximise coral growth and fluorescence. (support.ecotechmarine.com)
The profile heavily emphasises:
- UV
- Violet
- Royal Blue
- Blue
while keeping:
- White
- Red
- Green
at much lower levels. (The Coral Shop)
For many reef aquariums, AB+ is the ideal starting point.
Best Radion G6 Settings for SPS Corals
SPS corals generally require the highest PAR levels and most stable lighting conditions.
Examples include:
- Acropora
- Montipora
- Stylophora
- Pocillopora
- Birdsnest Corals
Recommended Spectrum
AB+ Profile
Recommended Intensity
75–100%
depending on coral placement and aquarium depth. (Charterhouse Aquatics)
Recommended PAR
350–450 PAR
for most Acropora species. (Charterhouse Aquatics)
Photoperiod
- 2-hour sunrise ramp
- 6–8 hour peak period
- 2-hour sunset ramp
Why It Works
The blue-heavy spectrum provides strong photosynthetic energy while enhancing fluorescent pigments that create the vivid colours SPS keepers strive for.
Best Radion G6 Settings for LPS Corals
LPS corals generally prefer moderate light levels and slightly lower PAR.
Examples include:
- Torch Corals
- Hammer Corals
- Frogspawn
- Acans
- Lobophyllia
- Blastomussa
Recommended Spectrum
Modified AB+ or Radiant Color
Recommended Intensity
50–75% (Charterhouse Aquatics)
Recommended PAR
100–200 PAR (Charterhouse Aquatics)
Photoperiod
8–10 hours with gradual ramping.
Why It Works
LPS corals often show their best colouration under blue-dominant lighting but may become stressed under excessive intensity.
Best Radion G6 Settings for Soft Corals
Soft corals are generally more forgiving and thrive under moderate lighting.
Examples include:
- Zoanthids
- Mushrooms
- Leather Corals
- Kenya Trees
- Xenia
Recommended Spectrum
Blue and violet dominant.
Recommended Intensity
30–60% (Charterhouse Aquatics)
Recommended PAR
50–150 PAR
depending on species.
Photoperiod
8–9 hours.
Soft corals often display excellent colour and growth without requiring extreme light output.
Best Settings for Mixed Reef Aquariums
Most hobbyists operate mixed reefs containing a combination of SPS, LPS, and soft corals.
Recommended Spectrum
AB+
Recommended Intensity
60–80%
Recommended PAR Zones
|
Coral Type |
PAR Range |
|---|---|
|
SPS |
250–450 |
|
LPS |
100–200 |
|
Soft Corals |
50–150 |
By carefully positioning corals within different areas of the aquarium, a single Radion schedule can successfully support all three groups.
Sample Daily Radion G6 Schedule
A proven schedule for many reef aquariums looks like this:
08:00–10:00
Sunrise ramp
0–25% intensity
10:00–18:00
Peak lighting
75–100% intensity
18:00–20:00
Sunset ramp
Gradual reduction
20:00–22:00
Optional moonlight
5–10% blue channels only
This approach mimics natural daylight cycles while maximising coral photosynthesis. (Charterhouse Aquatics)
Using Acclimation Mode
One of the most valuable Mobius features is Acclimation Mode.
When introducing:
- New corals
- New Radion fixtures
- Higher light settings
Acclimation Mode gradually increases intensity over a chosen period. (Charterhouse Aquatics)
Recommended Acclimation Settings
Starting Intensity:
30–50%
Duration:
14–21 days
This helps prevent:
- Coral bleaching
- Tissue recession
- Stress responses
Radion G6 Blue vs Pro for Coral Growth
Many hobbyists ask which model grows corals better.
The reality is:
Growth
Both are highly capable of supporting exceptional coral growth when PAR requirements are met. (Reef2Reef)
Appearance
The difference is primarily visual:
- G6 Blue emphasises fluorescence
- G6 Pro provides a more natural daylight look
For growth alone, there is little difference when intensity and coverage are equivalent. (Reef2Reef)
Should You Customise the Spectrum?
For most hobbyists:
No
EcoTech’s CoralLab presets have already been extensively tested and refined. (support.ecotechmarine.com)
The safest approach is:
- Choose AB+
- Adjust intensity
- Leave spectrum unchanged
Many successful reef keepers run AB+ for years without major modification.
The Importance of PAR Testing
Every aquarium is different.
Factors affecting PAR include:
- Mounting height
- Water depth
- Rockwork
- Glass thickness
- Water clarity
A PAR meter provides the most accurate way to confirm your corals are receiving appropriate light levels. (Bulk Reef Supply)
Without PAR measurements, intensity adjustments are largely guesswork.
Common Lighting Mistakes
Running Intensity Too High
Can lead to bleaching and stress.
Constantly Changing Settings
Corals thrive on stability.
Ignoring Acclimation
Rapid changes often cause problems.
Chasing Colour Too Quickly
Growth and colour development require patience.
Overcomplicating Spectrum Settings
Simple, proven presets often outperform highly customised schedules.
Signs Your Lighting Is Correct
Healthy corals typically display:
SPS
- Strong polyp extension
- Bright growth tips
- Consistent colour
LPS
- Full inflation
- Good feeding response
- Stable colouration
Soft Corals
- Consistent expansion
- Active growth
- Strong colour
These indicators are often more valuable than chasing specific numbers.
Final Thoughts
The EcoTech Radion G6 remains one of the most capable reef lighting systems available today. Whether you’re growing demanding SPS colonies, colourful LPS corals, or a thriving mixed reef, the key to success lies in balancing spectrum, intensity, and stability.
For most reef aquariums, the proven CoralLab AB+ profile combined with appropriate intensity levels provides everything needed for excellent coral growth and colouration. Start conservatively, use Acclimation Mode, monitor your corals closely, and make gradual adjustments over time.
At Charterhouse Aquatics, we stock the complete EcoTech Radion G6 range, mounting systems, PAR meters, and reef aquarium accessories to help you create the perfect lighting environment for your corals.
