Lighting for a 20g long - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 6 Old 09-30-2012, 02:08 PM Thread Starter
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Lighting for a 20g long

What would be a good lighting for a 20 long? Right now I have a single 24'' T8 on it.

I want to be at a moderate to high lighting because I am growing Cambomba, the red variant, Bacopa, and Duckweed.

I'm would also appreciate suggestion for other plants that my kuhlis and honey gourami would enjoy playing with.
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post #2 of 6 Old 10-01-2012, 02:17 PM
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With a good tube, the present fixture might be fine. A "daylight" tube with around 6500K rating. If the additional expense is not an issue, a good tube is the Hagen Life-Flo, or the ZooMed UltraSun; both are 6700K.

Liquid fertilization will obviously be needed, as the Cabomba is fast-growing. I will caution that this still might not be sufficient for this plant, but before buying a new fixture it may be worth trying. A 20g long is not as deep a tank so the light will be more intense. But if this should prove insufficient, a dual T8 fixture will be the next step up [a single T5 HO would work, but I don't think one can get single-tube T5 fixtures].

Another option is incandescant [screw-in bulbs rather than fluorescent tube]. If a fixture with 3 sockets is available, using CFL Daylight 6500K bulbs can work. These come is varying wattages, the higher the wattage the more light with CFL bulbs.

One other factor enters this though, and this is CO2. Stem plants, especially reddish ones, need more light and nutrients including CO2, so even with more light the CO2 may not be sufficient. As every aquarium is unique, it is difficult to be precise.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #3 of 6 Old 10-01-2012, 02:36 PM Thread Starter
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I was looking into CFLs but I couldnt find the kelvin ratings on them.
I have seen single t5 strips but I would need a way to raise it off the glass.

I'm dosing API CO2 booster and flourish but the API is every other day until I can get a DIY Co2 system
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post #4 of 6 Old 10-01-2012, 05:49 PM
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Quote:
I was looking into CFLs but I couldnt find the kelvin ratings on them.
Most don't have this, they may say "warm" or similar. But the 6500K do have the Kelvin, at least GE does. It is sometimes called "Natural Daylight" or "Super Daylight" or something similar.

Quote:
I have seen single t5 strips but I would need a way to raise it off the glass.
Do you mean that the fixture does not fit across the tank so as to sit on the frame?

Quote:
I'm dosing API CO2 booster and flourish but the API is every other day until I can get a DIY Co2 system
I must caution on the API CO2 Booster. This is glutaraldehyde and water, the same as Seachem's Excel. Glutaraldehyde is a toxic disinfectant used in hospitals because it kills bacteria. Some plants may be killed at normal dosage; at higher doses fish and bacteria will be affected and likely killed. For this reason alone, I will never use it, but rely solely on natural CO2.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #5 of 6 Old 10-01-2012, 06:04 PM Thread Starter
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The T5 is a fixture but it is not encased anything, just the bulb and balladt
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post #6 of 6 Old 10-01-2012, 07:12 PM
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Quote:
Originally Posted by Tigris View Post
The T5 is a fixture but it is not encased anything, just the bulb and balladt
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Got it. Yes, it needs some sort of housing.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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