Red Light - Good or Bad for Corals?

[Mark Gray]

And here is a picture showing the first 40 cm below the surface. The Heliospectra fixture is rather close to this part of the aquarium

I´m not so afraid of red wavelenghts.

You can see how the birsds nest looks like - before the got to my aquarium and start to be like balls

Sincerely Lasse

Looks very good

 

[Robthorn]

Thanks to this thread for reminding me that I added red into my program on my radions. My corals have been getting less and less color since around that time. No idea if this was the cause but it is worth a try so I turned the red and green back off last night.
Fingers are crossed

 

[Da Ghost]

Thanks to this thread for reminding me that I added red into my program on my radions. My corals have been getting less and less color since around that time. No idea if this was the cause but it is worth a try so I turned the red and green back off last night.
Fingers are crossed

So what was the end result? What setting are you currently using on your Radions? How much red had you added at that time? What do you have the red set to now? Very curious.

 

[Robthorn]

Unfortunately my tank is no better off D Ghost and I had been searching for the answer to my tanks slow spiral. I think I have found the true problem as bad salt and/or dosing elements. I am refraining from bad mouthing the company until I can be sure. I switched salts to see what happens. Fingers are crossed.

 

[Da Ghost]

Unfortunately my tank is no better off D Ghost and I had been searching for the answer to my tanks slow spiral. I think I have found the true problem as bad salt and/or dosing elements. I am refraining from bad mouthing the company until I can be sure. I switched salts to see what happens. Fingers are crossed.

Sorry to hear that. Good luck and keep us posted.

 

[jantje]

Dr Tim Wijgerde is doing some research with Coralcare LED light by philips.
Important subject on the research was the effect of the red spectrum, therefore special prepared Coralcare was used (as normal coralcare dont have a high output in that spectrum.)
https://m.facebook.com/MarineAquacultureResearch/

 

[Donovan Joannes]

Dr Tim Wijgerde is doing some research with Coralcare LED light by philips.
Important subject on the research was the effect of the red spectrum, therefore special prepared Coralcare was used (as normal coralcare dont have a high output in that spectrum.)
https://m.facebook.com/MarineAquacultureResearch/

Wow. I like the way it looks (philips coralcare spectrum). Super crisp and very well blended.

 

[saltyfilmfolks]

Wow. I like the way it looks (philips coralcare spectrum). Super crisp and very well blended.

It’s too bad they won’t sell them in the US.
The big giant ad push was infuriating. The excuses doubly so.

 

[Donovan Joannes]

It’s too bad they won’t sell them in the US.
The big giant ad push was infuriating. The excuses doubly so.

Same here. We are using the same UK standard electricity (220vac 60hz) and uses the same power socket design but so far I haven't seen one installed, not even LFS have it.

 

[saltyfilmfolks]

Same here. We are using the same UK standard electricity (220vac 60hz) and uses the same power socket design but so far I haven't seen one installed, not even LFS have it.

It’s dc in the inside.
Most small TVs now come with an external power supply ac/dc converter. It’s not hard. Lol.

 

[Tristren]

It’s too bad they won’t sell them in the US.
The big giant ad push was infuriating. The excuses doubly so.

What was the reason in the end?
Are they still a live product in the EU?

 

[saltyfilmfolks]

What was the reason in the end?
Are they still a live product in the EU?

No idea what the official story is.
But yea, a few members got them from Europe , and few Europeans are running them.

 

[Sallstrom]

Right now we have some time, space and equipment to do a 2-4 week experiment. We already have two research LEDs from Heliospectra over a coral propagation tank. The LEDs have 380nm, 400nm, 420nm, 450nm, 530nm, 620nm, 660nm, 750nm and 6500K diods.
So we can do two different light recipes in the same water with corals that have been in the tank for years. The tank is connected to our large (10000 litre ) coral tank. We can meassure PAR and coral weight in water. The corals we use are Seriatopora hystrix.

What would you think be the most interesting thing to test over a period 2-4 weeks?

/ David

 

[Jose Mayo]

Yes, I have also read that the red light is perceived by the coral as a kind of "depth gauge", causing physiological changes of adaptation, with alteration in the production of pigments and in the regulation of the density of zooxanthelas in their tissues and, perhaps, therefore, delay growth. Depending on the intensity of the red spectrum, and over time, there may even be necrosis of coral tissues and eventually lead to death. The blue spectrum, on the other hand, seems to favor much more the development and growth of coral, and perhaps even to protect it from opportunistic infections by posible effect of the bactericidal control of blue light on the resident bacterial flora.

Red Light Represses the Photophysiology of the Scleractinian Coral Stylophora pistillata

In Vitro Bactericidal Effects of 405-nm and 470-nm Blue Light


Best regards

 

[Dana Riddle]

Right now we have some time, space and equipment to do a 2-4 week experiment. We already have two research LEDs from Heliospectra over a coral propagation tank. The LEDs have 380nm, 400nm, 420nm, 450nm, 530nm, 620nm, 660nm, 750nm and 6500K diods.
So we can do two different light recipes in the same water with corals that have been in the tank for years. The tank is connected to our large (10000 litre ) coral tank. We can meassure PAR and coral weight in water. The corals we use are Seriatopora hystrix.

What would you think be the most interesting thing to test over a period 2-4 weeks?

/ David

A couple of things come to mind - @Lasse has seen changes in morphology of this coral when exposed to red light. This would be interesting and easily done visually. A comparison of coral growth when exposed to blue- and red-weighted light would be interesting as well (do these Seriatoporas have the reflective red chromoproteins?) The longer the experiment lasts, the better, although I saw issues with coralline algal growths on the plugs at around 60 days, which, of course, skewed the results. PAM fluorometry would be nice too if you have access to that device.

 

[Sallstrom]

A couple of things come to mind - @Lasse has seen changes in morphology of this coral when exposed to red light. This would be interesting and easily done visually. A comparison of coral growth when exposed to blue- and red-weighted light would be interesting as well (do these Seriatoporas have the reflective red chromoproteins?) The longer the experiment lasts, the better, although I saw issues with coralline algal growths on the plugs at around 60 days, which, of course, skewed the results. PAM fluorometry would be nice too if you have access to that device.

Yes I will speak to @Lasse soon. He always have a lot of ideas. But this week I let him have some family time

One of the reasons we like to use Seriatopora hytrix in our experiments is that we don't need to have a plug or glue them to anything. They do fine lying on a raster or acryl. So it's easier to meassure the weight.

Thanks for the input! I must do some reading on PAM flourometry

/ David

 

[mcarroll]

Unfortunately my tank is no better off

Rob, do you have a thread open on your issue? I'm curious about the details and might have some ideas, but I don't wanna side-track this thread.

 

[Dana Riddle]

Yes I will speak to @Lasse soon. He always have a lot of ideas. But this week I let him have some family time

One of the reasons we like to use Seriatopora hytrix in our experiments is that we don't need to have a plug or glue them to anything. They do fine lying on a raster or acryl. So it's easier to meassure the weight.

Thanks for the input! I must do some reading on PAM flourometry

/ David

That's good - it sounds like you can avoid the issues with calcareous or other growths. Loking forward to your results!

 

[Dana Riddle]

Yes, I have also read that the red light is perceived by the coral as a kind of "depth gauge", causing physiological changes of adaptation, with alteration in the production of pigments and in the regulation of the density of zooxanthelas in their tissues and, perhaps, therefore, delay growth. Depending on the intensity of the red spectrum, and over time, there may even be necrosis of coral tissues and eventually lead to death. The blue spectrum, on the other hand, seems to favor much more the development and growth of coral, and perhaps even to protect it from opportunistic infections by posible effect of the bactericidal control of blue light on the resident bacterial flora.

Red Light Represses the Photophysiology of the Scleractinian Coral Stylophora pistillata

In Vitro Bactericidal Effects of 405-nm and 470-nm Blue Light


Best regards

Thanks for the links! I'm familiar with Tim's work, but haven't seen the other paper. Thanks again!

 

[Jose Mayo]

Thanks for the links! I'm familiar with Tim's work, but haven't seen the other paper. Thanks again!

Thanks to all of you, I am learning a lot here!

I would very much like to know of some research that evaluated the ability to protect or cure some frequency of the blue spectrum in relation to corals. It is known that Pseudomonas sp. is a frequent presence in domestic aquariums and may cause imbalances in both fish and corals, but it would be interesting to find out if any "engineering" in the design and spectrum of our luminaires could somehow contribute to the control of the microbial imbalance that can occur in our tanks. On the other hand, it would also be interesting to know how much the spectrum of luminaires can interfere, for example, in the results of bacterial probiotic dosages and whether it would matter or whether, in the light of this knowledge, the administration of bacterial blends with light or off.

Best Regards