Can Natural Aquarium Lighting Work?
October 3, 2008 · Print This Article
The wild coral reefs sit under the sun and do well. Everything is correct – spectrum, intensity, photoperiod and the dawn/dusk sequence. Could the aquarist make use of Nature’s original?
For aquariums that contain corals the importance of aquarium lighting runs a close second to seawater quality, so it would seem reasonable to consider using the natural stuff. There are potential problems however.
The first consideration is sunlight and its availability. The skies over wild reefs are often blue but not always, clouds pass over and sometimes storms. Therefore continuous sunshine is not a necessity. However, for most of us in temperate areas the amount of cloud we experience is much more and I wonder how the zooxanthellae (algae within corals) will fare. They need the correct light to prosper and it is probable that the corals would have problems.
There are aquarists in blue sky areas where cloud cover is not so prevalent, and maybe the sunshine periods are not too far off those on wild reefs. So using natural light is more of a proposition. How could the sunshine be directed to the aquarium from the top? Allowing the sun to shine on the front glass of the aquarium could produce excessive algae growth there, thus spoiling the aquarist’s view and causing excessive cleaning of the glass. If the seawater is of high quality with little or no nitrate and phosphate, as it should be, algae growth within the aquarium shouldn’t be a problem, but it always surprises me that the stuff does appear quite clearly on viewing glasses nevertheless. Having said all that, if there is a fairly substantial nitrate and/or phosphate presence then algae could well proliferate much to the aquarist’s annoyance – the word sunlight could well turn into sunblight.
The answer could be to put the aquarium in a room below a low roof where a roof window of suitable proportions has been provided. This would allow the sunlight to slowly hit the top of the aquarium, reach full intensity, and then slowly reduce again. The risk of the seawater overheating would also be much reduced.
I am only aware of two aquarists that have used natural sunlight, and in both cases am not aware of the complete result.
In the first instance the aquarist did in fact have a window in the roof more or less as described and the corals did well for a while. Unfortunately, the area of the world where the aquarist lived meant that the sun dipped towards the horizon as the seasons changed and the sunlight became too weak or missed the aquarium completely. I feel sure the aquarist would have known the sun would do this but he must have miscalculated. What was done about it I don’t know – I’m sure putting the aquarium on wheels wasn’t an option!
In the second case the aquarium was located in a conservatory. There were too major problems, I know that one was fixed but don’t know about the other.
Clearly, in a conservatory with its glass roof and sides sunlight would have unrestricted access. Conservatories when bathed in sunlight can become very warm – this is one of the attractions of them. Unfortunately, this warmth caused problems with seawater temperature stability, usually climbing too high. The aquarist obtained a cooler (chiller) and as far as I am aware this cured the problem. The second problem was as mentioned earlier – algae. This algae not only caused very regular cleaning of the viewing glasses to be required, but caused excessive algae growth in the aquarium itself causing the aquarist to appeal for assistance (generally, not to me personally). I noted the nitrate level was quite high (if I remember correctly it was about 30ppm) but there wasn’t a mention of phosphate so that could have been anything. The aquarist was advised to reduce the nitrate level and reduce and control the sunlight (how?) but didn’t respond further. Perhaps the aquarium was re-located.
A keen advanced aquarist experimenting is great and this is how progress is achieved, and is to be applauded. However, with the hobby in the position it is today the usual path with lighting is better for most.
The aquarist can have lighting exactly suited to his/her needs relevant to the livestock being kept. That lighting can be closely controlled by the use of electric timers and an acceptable dawn/dusk sequence introduced, and the photoperiod adjusted according to need. For the great majority of us electric lighting is the answer.
Related Posts - I Know About Seawater Quality, But... Marine aquarists aim to maintain seawater which is of the highest quality. The reward for doing so is a vibrant aquarium, be it a fish...
- The Staghorn Coral These corals belong to the hard type and are much used in reef aquariums. Writing a text on them in general terms is the only...
- How To Change A Fish Only Aquarium Into A Reef Aquarium caniThe aquarist running a fish only aquarium has gained a great deal of valuable knowledge about husbandry. He/she has also been able to keep fish...
- Building An In-Wall Aquarium - What To Look Out For Constructing a marine aquarium system is very enjoyable and exciting, with all the research into different types of equipment that will be needed following the...
- Coral Calcification There are many marine aquarists successfully keeping corals nowadays and a good thing it is for protection of the reefs because of commercial interest, a...
Related Websites - Are You in a Sleep Debt? Are you in debt? Sleep debt, that is? The average adult needs 7-9 hours of sleep - a night. Most of us get 6 hours...
- How to Install Recessed Lighting Recessed lighting is a great way to add some modern flair to any room in your home. It looks especially snazzy in the living room...
- Natural Treatment For Rosacea Some rosacea skin treatments can cause almost as much irritation as the condition, so it is very important to pick the right one. Rosacea can...
Comments
Got something to say?