Blue / White ratio?

[ElitePirate]

Hi guys

Just wanted to clarify this - I have a Kessil A80 light. I'd like to leave the Blue color at 100% and 0% white because of the look. Is it ok? 100% blue will not affect the fish right? light intensity is 70% for 8 hours daily.

Thanks

 

[DFR]

That’s fine, it will not affect the fish!

 

[Crazeh]

The zooxanthellae within your corals will utilise some of the wavelengths offered by the whites and not blues. Having said that plenty people run blues only without any problems, so go ahead and just monitor things and take it from there.

Fish will be fine under blues generally speaking - In my tank they sleep/hide under blues which makes feeding etc. difficult. I definitely need the whites running for part of the day so they can get out and swimming.

 

[DFR]

The zooxanthellae within your corals will utilise some of the wavelengths offered by the whites and not blues. Having said that plenty people run blues only without any problems, so go ahead and just monitor things and take it from there.

Fish will be fine under blues generally speaking - In my tank they sleep/hide under blues which makes feeding etc. difficult. I definitely need the whites running for part of the day so they can get out and swimming.

You actually have that backwards. Zooxanthelle within corals utilize light in the ‘blue’ wavelength. That’s why kessil remains heavy in those specific wavelengths. In the ocean as you go deeper, the water filters out the other ‘colors’ leaving a more blue heavy spectrum so in actuality that would probably be a more natural look to many fish.

 

[clownvalk3]

What is the benefit of the blue and white light?

 

[Crazeh]

You actually have that backwards. Zooxanthelle within corals utilize light in the ‘blue’ wavelength. That’s why kessil remains heavy in those specific wavelengths. In the ocean as you go deeper, the water filters out the other ‘colors’ leaving a more blue heavy spectrum so in actuality that would probably be a more natural look to many fish.

What I meant was the Zooxanthellae will use some spectrum which isn't available when running just blues, in this case the redder end of the spectrum.

I wasn't saying they don't use blues, just that they use wavelengths also available only when the whites are on. I agree they mostly utilise blues, hence the reason it will be ok.

 

[clownvalk3]

What does the blue do?

 

[John3]

I’m a heavy blue guy myself, but more recently I’ve noticed some corals If given some white light will fluoresce better under blues. Specifically I’m noticing this with a gold torch. The more white light it gets, the more yellow glow it has under the blues.