pearling plants= good lighting?? - The Planted Tank Forum
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post #1 of 4 (permalink) Old 02-06-2003, 10:04 AM Thread Starter
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Ive been wondering about if my tubes are good for my plants, Im currently using 3 6500K Narva tubes, My plants are pearling nicely (I also use DIY CO2), does this mean that the tubes are good enaugh? Ive been wondering about getting Sylvania gro-lux tubes but theyre pretty expensive.
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post #2 of 4 (permalink) Old 02-06-2003, 01:38 PM
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From what I have read, and I'm a newbie, pearling occurs because the water has become fully saturated with oxygen. Since oxygen can not be dissolved in the water, air bubbles, the pearls, form on the leaves of the plant. In order for oxygen to be released by the plant, photosynthesis has to be occurring. Photosynthesis requires light. So based on all that, sounds like your set up is working. Are the tubes good for your plants? I dunno. I suspect that more light would trigger more photosynthesis, making more oxygen, resulting in more pearls.


55 g ~ 404 Fluval Canister ~ 110w 6400k photoperiod 8 hours at the end of the day
10 g quaratine/hospital
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post #3 of 4 (permalink) Old 02-06-2003, 02:12 PM
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Tom is right. The pearling that your plants are exhibiting is a sign of good health. That is not to say that your lighting is ideal. I'm surprised to hear that you have found the Sylvania Gro-Lux tubes to be expensive. Here in the states they are available at Home Improvement centers for around US$5 each. I haven't heard anything about the 6500K Narva tubes. But as long as they are strong in the blue/red spectrum and weak in the yellow/green, then they're great plant bulbs.

- Sam P -
plantedtanker in limbo - all tanks currently in storage
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post #4 of 4 (permalink) Old 02-06-2003, 02:37 PM Thread Starter
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Thank you,
unfortunately major supplyers dont carry the Sylvania tubes here and so theyre only sold at pet stores and cost about 30 dollars

Eheim pimp #127.
600 ltr (160g) planted tank. Pressurized CO2, Eheim 2260 & Sacem Marathon 2000, 156W T5.
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