Pearling - The Planted Tank Forum
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post #1 of 4 (permalink) Old 06-14-2005, 10:05 PM Thread Starter
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This morning I switch on manually my Light (9am) for do some maintenance and I forgot to switch it back to automatic and gone to work.
To night when I came back form work (23 pm) all my plants was pearling big time like never before. I have pressurised CO2 and 100 Watt per US gallon. I normally leave the light for 11 Hrs but never had this pearling. Does this mean I donít have enough WPG or donít leave the light switch on long enough?
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post #2 of 4 (permalink) Old 06-14-2005, 10:22 PM
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I think it means your tank had enough time to increase CO2 concentration and the plants had an abundance of photosynthesis.

100W per US gallon? Are you sure?
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post #3 of 4 (permalink) Old 06-14-2005, 10:31 PM Thread Starter
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No sorry 2.5Watt/gallon, 100 W over a 40 gallons. And I was worry about my spelling!
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post #4 of 4 (permalink) Old 06-14-2005, 11:42 PM
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The problem is it could be many things that cause more pearling than normal. Most likely the extended photoperiod allow the water to become saturated with oxygen and so you see more pearling. I would, however, caution you against increasing the photoperiod to anything greater than 12 hours.


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