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Would a single T5 NO be ok for a 20 gallon long?..

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Would a single T5 NO be ok for a 20 gallon long?..
Old 04-27-2013, 11:17 PM   #11
ao
 
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here comes the experts!
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Old 04-28-2013, 11:50 AM   #12
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What I have in LEDs is probably pretty close. It's a 24" in a 30" tank, 37 gallons so its a bit tall which also reduces the light at the bottom in addition to the duckweed and floating pennywort. I just setup another tank with a T5, 20 gallon 24" tank but haven't had it going long enough to judge yet. I will be moving my LED over to it and upgrading my main tank to a more plant oriented unit... more light.

Make sure that the bulb is a plant bulb though. 6,000 -7,000 kelvin or some full spectrum equivalent.

Floaters are OK as long as you can control them somewhat. I slid the fixture to one end to create a really low light end for all the crypts and java fern and put all the medium light stuff more directly under the fixture.... you might not be able to do that with a fluorescent.

Jeff.
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Old 04-28-2013, 12:19 PM   #13
 
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I have a 24" T8 over my 29 gallon tank with floating plants (which is Frogbit now) and my plants below do fine. In fact without the floating plants I have problems with getting algae on the leaves of my Anubias. A 20 long is shorter plus I believe a T5NO is a lil bit brighter so I see no reason you couldn't have floating plants and be alright.
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Old 04-28-2013, 01:40 PM   #14
 
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I have a 24" T8 over my 29 gallon tank with floating plants (which is Frogbit now) and my plants below do fine. In fact without the floating plants I have problems with getting algae on the leaves of my Anubias. A 20 long is shorter plus I believe a T5NO is a lil bit brighter so I see no reason you couldn't have floating plants and be alright.
I agree, with one caveat. The tube itself can affect this. I did specific experiments with some tubes on my 29g, which takes a single T8 24-inch length. The low and moderate light plants did well with a Life-Glo tube; but with a GE Daylight they failed and actually began dying after a few weeks. Same with one of those so-called "plant" types; they are simply not strong enough (intensity). I had a cover of floating Water Sprite with all tubes as well, and regular fertilization was the same.

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Old 04-28-2013, 01:51 PM   #15
 
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Byron yes your right I wasn't thinking about the bulb itself. I use Zoo meds Ultra Sun Super Daylight bulbs on this as I get better growth from it. My 10 gallons I just use the GE daylight bulbs.
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Old 04-28-2013, 04:08 PM   #16
 
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Byron yes your right I wasn't thinking about the bulb itself. I use Zoo meds Ultra Sun Super Daylight bulbs on this as I get better growth from it. My 10 gallons I just use the GE daylight bulbs.
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Yes, the ZM UltraSun is as far as I can tell much the same as the Life-Glo; I unfortunatley no longer have a ZooMed dealer near me, but when I used a couple of the 4-foot tubes I found them the same.
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Old 04-28-2013, 04:31 PM   #17
 
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I use ZM bulbs also. They are very close to Life Glo bulbs. I get excellent growth with the ZM bullbs. I also have excellent luck with the Aqueon twin tube T-5 NO bulbs. Although the fixtures leave a little to be desired
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