Tropical Fish Keeping - Aquarium fish care and resources

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steelerfan 04-15-2008 02:51 PM

Actinic Blue Question
Just wondering if the actinic blue lamps are appropriate for fresh water plants in general?? Will be 90 Gal corner bowfront, live plants, community fish, looking at dual satellite 2x96W 36".

okiemavis 04-15-2008 03:58 PM

Actinic doesn't benefit freshwater plant growth. Plants grow mostly from the green and red frequencies in light. Actinic is blue and benefits coral growth.

fish_4_all 04-16-2008 09:40 PM

Some of the better plant keepers I know swear by actinic as being beneficial for providing more of a variety of wave lengths of light and plants do actually do better when using it. But remember, this has to be coupled with enough light for the plants to thrive WITHOUT the actinic.

i.e. 90 gallon high light would be around 180 watts of quality high lumen lighting in the correct Kelvin rating between 5,500K and 10,000K. Adding actininic does not increase your total light output but does increase the total spectrum that the plants get and will benefit them. Just don't count the Actininc toward your calculations.

steelerfan 04-17-2008 06:56 AM

OK, thanks guys...Original plan was Aqualight 2x96W PC, both lamps 10,000 K, but found the dual satellite for about $45 cheaper. But given your info and some real bad reports on the fan noise, I think I'll go back to the original plan!

FuzzAz 04-23-2008 07:51 PM

if you look at the graph on a coralife 6700 k bulb (and I imagine any other full spectrum bulb), there is some light in the near ultravoilet reagon of the spectrum to about 400nm. so even if sombody wanted to say that actinic was important for plants, about every full spectrum bulb has atleast some. and I beleive okiemavis is mistaken, green light is actually the most useless light for plants, and this is the reason why most plants are green.

steelerfan 04-23-2008 08:23 PM

Yea, i've pretty mcuh decided that the 192W of 6700/10000K should be just ducky, but am anticipating the need for CO2 supplementation--I really would like to see nice lush plant life, not only for the benefit of the fish and my own eye, but the algae fighting properties as well!!

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