Light and air questions
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Light and air questions

This is a discussion on Light and air questions within the Beginner Planted Aquarium forums, part of the Beginner Freshwater Aquarium category; --> Do underwater plants produce oxegen? If so do I still need the airstone for the fishes? Also I can't find a light with suffiecient ...

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Light and air questions
Old 03-15-2008, 02:25 PM   #1
 
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Light and air questions

Do underwater plants produce oxegen? If so do I still need the airstone for the fishes?

Also I can't find a light with suffiecient wattage around here but I have found a light that is an 18W 5,500K daylight, is this sufficient enough for a 10G? The package says it's ideal for freshwater plants, but I wanted second opinions before buying.
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Old 03-15-2008, 03:05 PM   #2
 
Airstones do not generate oxygen in the aquarium. Their bubbles break the surface tension of the water to allow for the CO2/O2 transfer to be made.

The light should be fine. The depth of a 10g tank is such, that the bulb you have chosen should suffice. It's all about lumens and a certain distance from the light source.
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Old 03-15-2008, 03:19 PM   #3
 
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Ok, I thought I needed the airstone for the fish to have oxegen.

What do you mean by the CO2/O2 transfer?
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Old 03-15-2008, 03:33 PM   #4
 
That is a in goes the good air, out goes the bad air thing. CO2 is expelled from the water and O2 is drawn into the water column. One of the great wonders of nature.
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Old 03-16-2008, 01:17 AM   #5
 
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So this is negating my co2 injection? Or is that the point of the co2 injection?
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Old 03-16-2008, 04:58 AM   #6
 
Yes, to some degree aeration does hinder CO2 injection. I turn off aeration when using CO2. It's all on timers here anyway.
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Old 03-16-2008, 01:07 PM   #7
 
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And again I started somthing that I didn't fully understand
Are the bubbles best left on at night or during the day?
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Old 03-16-2008, 01:35 PM   #8
 
My timers are set to inject CO2 during the lightless cycle, which is night. I have my lights on 14 hours a day and run CO2 for eight hours. Don't ask me why I decided on this format, I just started using it after I noticed that my fish were laboring using other timing options. Plants and fish are thriving, so I don't mess with it any more. As they say, "If it ain't broke, don't fix it."
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Old 03-16-2008, 02:37 PM   #9
 
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OK thanks for all your help I greatly appreciate it.
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