05-18-2009, 01:31 PM
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Originally Posted by Jolly Jerry
The light I have does not seem to be helping my plants grow. I need your help in buying a good light system for my tank. I really like the blue light, I think this represents moon light. I will have to order it on line, My local fish stores dont have a lot to choose from. Any info you can send my way would be helpful.
The best light for a planted aquarium is full spectrum fluorescent. This is not only my personal experience, it is what every plant authority I have read says, so I take it as good advice. Plants use light in the blue part of the spectrum and also red, but adding the green/yellow (as in full spectrum) gives the aquascape a natural look and the plant and fish colours are realistic.
Without CO2 added, 1-2 watts of full spectrum lighting per gallon is adequate for most rooted plants and even a few stem (bunch) plants. At higher levels of light, say 4+ watts per gallon, you usually require CO2 added to balance the higher light, otherwise the plants can't use it and algae will. The photos of my two aquaria show what's possible with the above, no CO2, and twice weekly liquid fertilization to supply trace elements. The fish provide the necessary CO2 in these setups.