Tests regarding acropora growth.

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Im going to try soon in a few weeks, in the sump growing acros with a light designed to grow chaeto. Im going to weigh all plugs for the trials and make sure they are identical and weigh frags as well. After 2 months I will way the ones in the display and the ones in the sump making sure both are in the same par levels. I will make a thread on these trials. Like I said there may be a simple answer but it doesnt make sense to me how we use a completley different spectrum to grow algaes and chaeto when corals are primarily made up of calcium structure an xooxanthellae. At least they are to my knowledge..
 
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Phelipe's Ocean said:
Wow look at those colonies! How is growth for you under this grow light?
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The growth is good. As good as in the rest of the tank I think. But have not meassured so I can't really say. All I know is that they are growing :) And again, there are a lot of different light sources over this tank, so the light get mixed.

We tried these LEDs over another large reef tank but lowered the red(660nm) after a couple of month. The corals did'nt thrive with just these LEDs with 100% on all channels. It's possible that the results would have been different if we have added more blue lights.
But it's also possible that it was something completely different that caused it :)
 
BradB said:
I know from experience:
1) optimal growth is way shorter a photo period than optimal viewing
2) this matters a lot less than flow and alkanity

I like to see my tank, so I run 12 hours or longer. As a commercial grower, I might run 5 hours to cut the cost of electricity, but this is negligible as a hobbyist
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Do you have any numbers to share? I'd like to look at your PAR/PPFD and calculate the Daily Light Integral. Types of corals would be appreciated as well.
 
A comment on red light (631 and 657nm) generated by a LED on zooxanthellae photosynthesis (most likely Clade C15) in a Porites lobata. Rate of photosynthesis was just slightly higher than seen under other LEDs, but what is remarkable (to me at least) is the complete absence of protection due to the Xanthophyll Cycle (this was seen under other light sources at the same light intensity.) There was energy dissipation through Non-photochemical Quenching (other) but why were the xanthophylls not activated? What would we see if near-monochromatic LED light intensity was increased (these tests were conducted with PPFD at about 125 micromole/m2/sec.)
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Tidal Gardens
Brian Bieger said:
I want to know about the experiment where they are shocking the corals with electricity to make them grow faster!
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Plenty of tanks out there with acros and stray current. Think the verdict is more harm than good ;)
 
Brian Bieger said:
I want to know about the experiment where they are shocking the corals with electricity to make them grow faster!
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I don't think that is intended for accelerated growth. If I'm thinking about the same experiments.. it is just to help with coral attachment to submerged metals quicker, not actual growth. They have one setup on a beach I dive at occasionally. The corals they placed there grow no quicker then ones on the reef next to it. Something with the electricity helps calcium build up over the metals, supposedly.
 
How long would y'all recommend running 20K halides on an acro/monti dominated tank supplemented with t5s. I currently run my halides for about 9 hours, and t5s for about 12.5 hours. Would I get better color if I shorten the halide cycle? I'm happy with my color now, but after reading how many people run short full spectrum periods I'm wondering if I'm doing more harm than good.
 
Dana Riddle said:
A comment on red light (631 and 657nm) generated by a LED on zooxanthellae photosynthesis (most likely Clade C15) in a Porites lobata. Rate of photosynthesis was just slightly higher than seen under other LEDs, but what is remarkable (to me at least) is the complete absence of protection due to the Xanthophyll Cycle (this was seen under other light sources at the same light intensity.) There was energy dissipation through Non-photochemical Quenching (other) but why were the xanthophylls not activated? What would we see if near-monochromatic LED light intensity was increased (these tests were conducted with PPFD at about 125 micromole/m2/sec.)
red.png
Click to expand...

Learn something new everyday! I wonder what the results would be with infrared (850nm) from my knowledge ORPHEK is the only company that uses that spectrum in their led’s. The growth shots I have seen with their lighting is very impressive. I am hearing blue plays a very important role and not just red. Would par levels be high enough with a fixture that uses just various red and blue spectrums? How would coloration be affected without white led’s in the mox? So many questions I have and want to learn about.
 
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Brian Bieger said:
https://www.google.com/url?sa=t&sou...FjAEegQIABAB&usg=AOvVaw0TiLuU0AsNh6mn4wzVjSpE

https://www.google.com/url?sa=t&sou...FjADegQIBxAB&usg=AOvVaw3_mJzu_CVpQqOHCzn4Cb1N

https://www.google.com/url?sa=t&sou...FjAIegQIAxAB&usg=AOvVaw1qUpycQt_U9yBiGPC9OyzU

it's a real thing, but not good in sealed environment like a tank.
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That is so crazy! What is the reason for it not being a good idea in a tank? Besides the danger factor of course. Instead of running current through Bio Rock what would happen if you ran a controlled 3 watt current in the water with just corals? Could you still run heaters with the current? So many unanswered questions I want to learn about now.
 
Phelipe's Ocean said:
Learn something new everyday! I wonder what the results would be with infrared (850nm) from my knowledge ORPHEK is the only company that uses that spectrum in their led’s. The growth shots I have seen with their lighting is very impressive. I am hearing blue plays a very important role and not just red. Would par levels be high enough with a fixture that uses just various red and blue spectrums? How would coloration be affected without white led’s in the mox? So many questions I have and want to learn about.
Click to expand...
Orphek's Atlantik V4 has two IR LEDs peaking at about 845nm. This is the same bandwidth Walz uses in their PAM fluorometer. They (Walz) state the IR 'relaxes' the electron flow between Photosystem II and Photosystem I thus preventing a damaging electron traffic jam. I've got to get back in the lab - Orphek built a custom IR strip for me to test. I'm presently working on PUR evaluations and hope to get testing done soon after I get back from making presentations in Italy later this month.
 
Dana Riddle said:
Orphek's Atlantik V4 has two IR LEDs peaking at about 845nm. This is the same bandwidth Walz uses in their PAM fluorometer. They (Walz) state the IR 'relaxes' the electron flow between Photosystem II and Photosystem I thus preventing a damaging electron traffic jam. I've got to get back in the lab - Orphek built a custom IR strip for me to test. I'm presently working on PUR evaluations and hope to get testing done soon after I get back from making presentations in Italy later this month.
Click to expand...

Woww so much going on! Cant wait to hear about it :)
 
ReefBot Lab, Automated Water Tester
So im ready up on this whole thing with electricity, seems like they were running it through a special form of rock, and mounting the coral on it. In a trial system running a current through the water is very dangerous but a test I would like to see. A positive current inhibits growth while a negative current increases growth this is known with regular plants so I would assume it would be the same for coral. Running a 5 watt negative current through a tank with no fish, and im guessing no heaters as well as It will probably cause a reaction with the current? Now to figure out how a negative current can be created...
 
Hey not entirely relevant but I've had these pieces of echinopora llamelosa in the return chamber of my sump for almost 2 months. The only light they get is 12 hrs of spillover from my refugium light, a kessil h380. They havent changed much. I dont think they are growing but I took a piece out and put it under normal lighting and the color was the same as it used to be. Pretty cool.
29c4c588464d48afac9aec20f4ffa878.jpg
 
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