Tropical Fish Keeping - Aquarium fish care and resources

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CAP 10-29-2012 10:06 PM

Lighting Confusion
 
So I read some articles around the web about aquatic lighting for planted tank and I am getting conflicting advice. Some advice to follow the WPG rule while this forum does not. I have a 125G and I wanted to buy two of these fixtures Shop Utilitech 3" Utility Fluorescent Lighting at Lowes.com with T8 bulbs. Is this an ok setup?
I do not want to grow anything crazy. I was thinking something like Java Ferns

Geomancer 10-30-2012 10:56 AM

That would be way too much.

WPG is an outdated model that no longer works with modern technology which is why most do not use it anymore.

For just Java Fern, a single tube T8 would be enough. Dual T8 would be moderate light, and a quad like you linked would be high light.

On my own 125 gallon tank I have one dual 48" T8 and one dual 24" T8 fixture to span the 6 foot length. This is moderate light and is good enough for a lot of plants.

Java Fern do not necessarily like bright light. They are slow growers so they can get algae growing on them pretty easily, they actually like to be somewhat shaded.

Byron 10-30-2012 11:53 AM

I agree with Geo. And I also suggest dual tubes. In such a large tank, you will undoubtedly want to expand your plant options, and sword plants would be ideal. I have two 48-inch tubes over my 5-foot 115g tank and it is ideal. If your tank is 6 feet, what Geo sugested would be comparable.

Byron.

redchigh 10-31-2012 01:35 AM

I actually think the light isn't too much if you plan on planting heavily. Just load up with enough floaters to cover the surface- amazon frogbit, red root floaters, and water lettuce would do very well. If you can give a few inches gap between the water and the lights, even water hyacinth would be great.

(I agree the light is the upper end.. I use depth as a much better guide for light, but I'm still working on a formula...
if it helps, I use 20 watts for a depth of 12 inches.
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