04-02-2008, 10:08 PM
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What size is the tank? For freshwater plants depending on the types, you can have as little as 1 watt to as much as 4 or 5 watts per gallon of light but you want to make sure that the bulbs are providing the correct intensity of light for the plants. If your using only the stock lamp that came with the tank then I could pretty much bet that its not providing the right light for the plants and instead of your plants thriving the algea is taking over. A good bulb to run for plants is 6700K bulbs this is a full spectrum light that provides a good intensity for the plants.
Is there any algea anywhere else in the tank or is it just on the plants?
let me know then I can probably help you further.