09-10-2012, 02:02 PM
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Originally Posted by smit3183
I'm also struggling to balance the lighting to keep algae from growing but still get plant growth. I've been using to 6500k and getting brush algae or hair, it's one of them. Had lights on 10 hrs and eventually dropped to 8 but algae still grew. Should I maybe go back to 1 6500k bulb and do 10hrs? Just think their may be too much intensity with 2 bulbs over the 55
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Algae occurs due to light. It will always find sufficient nutrients, so when light is beyond what the plants can use, algae takes advantage.
Two T8 tubes over a 55g is not too much, and 8 hours is a reasonable duration. But the nutrients have to be present for these 8 hours so the plants can use the light.
Are you adding any fertilizers, and if so, which and how often? Do you know the GH of the tap water? And what plants arein the tank?
As an example, I have two of these tubes (48-inch T8 6500K) over my 70g 4-foot tank, and 8 hours is the most light I can give this tank or brush algae explodes. I dose Flourish Comp twice weekly. Brush algae is present, but basically under control.