Post pics of your sunlight powered reef here

Awesome tanks guys! Always thought that a system like this would be an algae haven but you guys have proved me wrong! Great work!
 
Awesome tanks guys! Always thought that a system like this would be an algae haven but you guys have proved me wrong! Great work!

I've heard this on serval occasions throughout my time in the hobby, even to the extend that I shouldn't have a tank near a window because it'll grow algae. I don't understand this? Why would it grow algae any more than a heavily lit tank? If sunlight gets to the tank what's the big deal? Free light for the corals right? If you've got a ton of algae in your tank I would assume its due to excess nutrients or a lack of animals consuming the algae, not too much light.

Not trying to be mean, just curious where this is rooted from.
 
I assume it was carried over from people who kept fish only salt and fresh water tanks which were high in nutrients and that were lit by very low PAR lights. They assumed it would do the same thing in a reef tank because they didn't know the root of the problem, which is obviously excess nutrients.

I do think, however, that sunlight will favor a different type of algae that "artificial" light doesn't favor, which probably depends on the differences in wavelengths. But of course, without excess nutrients, this is a moot point. ;)
 
I've heard this on serval occasions throughout my time in the hobby, even to the extend that I shouldn't have a tank near a window because it'll grow algae. I don't understand this? Why would it grow algae any more than a heavily lit tank?

One of the biggest myths in this hobby. :)

Keep your nutrients low...and you won't have a problem. Step out of line...and I mean just a little bit...and sunlit tanks will grow algae like there is no tomorrow. Artificially lit tanks are more forgiving, mainly due to the spectrum output being different to that of sunlight. Algae like the spectrum output given out by the sun (around 5500K - 6500K). On artificially lighted tanks, we tend to use higher kelvins in the 10 000 to 20 000K range.
 
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One of the biggest myths in this hobby. :)

Keep your nutrients low...and you won't have a problem. Step out of line...and I mean just a little bit...and sunlit tanks will grow algae like there is no tomorrow. Artificially lit tanks are more forgiving, mainly due to the spectrum output being different to that of sunlight. Algae like the spectrum output given out by the sun (around 5500K - 6500K). On artificially lighted tanks, we tend to use higher kelvins in the 10 000 to 20 000K range.

Makes sense to me
 
not 100% sun powered

not 100% sun powered

but enough that Sanjay noticed immediately

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i need help..i am very new to salt water tanks..i just started building ma second tank which is a 90 gal tank..i live in srilanka as u know it is right above the equator..my problem is the lights if i try to bye mh in srilanka itsgoing to cost me around 1000usd so i am thinking use the sunlight but my knowledge about this field is very low...can u guys plez help me out..if i keep the tank outside what are the problems i am going to face..if i use a uv sterilizer will that keep the algae away???
 
bump

bump

I see sunlight powered reef aquaria as a growing future trend.
Please post or link more solar powered reef aquariums to this thread.
 
I've used the sun on my tank for four months and am loving it. I only have live rock for now including a cabbage leather hitchhiker.
I need supplemental lighting for the winter before I stock with coral. What do you guys think of using several 50W 450nm LEDs with a lens to concentrate the beam to a 20" diameter and a single 50W 405-410nm LED with wider coverage as a fill light? I only intend to illuminate the areas with coral and want the spotlight effect.
 
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