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Old 02-17-2005, 07:54 AM   #1 (permalink)
 
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i have a 20 gal standard tank,think 16 3/4 high i am presently lighting with normal output flouresent.bulbs are 20watt aqua-sun and 20watt aqua-glo.do i leave this or go back to 55watt power compact.i am running co2 (pressurized).which would be better for as plants go.thanks for your replies.
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Old 02-17-2005, 07:54 AM   #2 (permalink)
 
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i have a 20 gal standard tank,think 16 3/4 high i am presently lighting with normal output flouresent.bulbs are 20watt aqua-sun and 20watt aqua-glo.do i leave this or go back to 55watt power compact.i am running co2 (pressurized).which would be better for as plants go.thanks for your replies.
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Old 02-17-2005, 08:01 AM   #3 (permalink)
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I would go with the PC's. PC's put out more lumens then NO flouresents and they last longer. Not to mention, if you have pressurized CO2 you should put it to good use with some good lighting .
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Old 02-17-2005, 08:07 AM   #4 (permalink)
 
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I am no expert on this but IMO I would go with the 55 watt PC it has more penetration to get to the bottom of the deep tank. No matter witch one you use the CO2 will be good for your plants.
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Old 02-17-2005, 08:27 AM   #5 (permalink)
 
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thanks jason and eric for the quick reponse.another question.for this size tank and this much light i have the dry ferts and also the flourish products,can you give me a general idea of how much of each to doseand how often.had algea out the ying yang when i had the 55pc on the tank before.thanks again...
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Old 02-17-2005, 08:48 AM   #6 (permalink)
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Doesing ferts seems to be the most challenging aspect of our hobby. There are many things that effect the equation of "how much".....such as amount of plants, amount of fish, light duration, CO2. First I would get a good amount of quick growing plants.....get your CO2 levels in the 20-25ppm range, then see where you are at from there.
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Old 02-17-2005, 10:17 AM   #7 (permalink)
 
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Jason is right on with his post. Remember loxman, to test your water to see where your ferts are if you are getting to much algae. The more plants you have the more nutrients are pulled away from that nasty algae.
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Old 02-18-2005, 06:49 AM   #8 (permalink)
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Something that a lot of people neglect to consider is light spread. A single PC will have great spread for a glosso only tank, but if you have a background wall of stems, then the spread quite frankly sucks. This is more evident with the AH kits which does a great job at getting the light "down".
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Old 02-20-2005, 10:08 AM   #9 (permalink)
 
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I could see how light spread could be a problem in large wide tanks with a single run on lights. But most large tanks have a bank of lights two and three wide. I run AH lights in single runs on 20gals 30gals and 15gals. I use a double bank of lights on 36gal bow and 75gal with out any problems with shadows, but this is something to plan for in large tanks so you can compensate for the light spread.

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