Low to mid lighting for a 75g - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 09-18-2013, 09:36 PM Thread Starter
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Low to mid lighting for a 75g

I'm looking for a light for a standard 75 gallon aquarium that will be sufficient for low and medium light plants. I do not plan on using pressurized co2 at this time.

Would any of the below lights suit my needs?

Finnex Ray 2
Fish-need-it 2 lamp t5ho
http://www.aquatraders.com/LED-Aquar...ht-p/56205.htm
http://www.aquatraders.com/48-inch-2...e-p/52123p.htm

Last edited by cowfish007; 09-18-2013 at 09:47 PM. Reason: grammar
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post #2 of 10 (permalink) Old 09-18-2013, 10:13 PM
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I use a dual lamp lowes t8 shop light on my 75, one bulb is 6500k and the other 5000k. Total cost was maybe $30, It grows crypt, swords, hygro sunset, bacopa, Val's, Anubias, wisteria, ludwigia repens.
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post #3 of 10 (permalink) Old 09-18-2013, 10:15 PM
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Quote:
Originally Posted by tattooedfool83 View Post
I use a dual lamp lowes t8 shop light on my 75, one bulb is 6500k and the other 5000k. Total cost was maybe $30, It grows crypt, swords, hygro sunset, bacopa, Val's, Anubias, wisteria, ludwigia repens.
Damn, I should have bought that light. Cheap !

temporary tanks for the time being...
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post #4 of 10 (permalink) Old 09-18-2013, 10:18 PM
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Damn, I should have bought that light. Cheap !
I had 4 t8s on the glass and took one dual fixture off a month or so back. I had such bad algae problems I started spot treating and then dosing a cap of excel a day and I have very little algae now. And I like the tank more then ever before. I'm looking for low light ground cover for the sandy area in front and will just start stuffing more stems in there and gradually replace te wisteria. There is a lot of fish in there to. Te Val's on the right I cut real low bc of that algae so once they grow you won't see that right side.
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post #5 of 10 (permalink) Old 09-19-2013, 02:22 PM
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I asked the same question not long ago and I think the finnex ray 2 will do what you want. LEDs may be more upfront but it'll be cheaper in the long run due to not having to change bulbs every 6 months and lower power consumption.

10g - 6 Harlequin Rasboras, 3 Otos, Red Cherry Shrimp
75g - 1 Angel, 5 Yellow Rainbows, 6 Columbian Tetras, 16 Rummynose Tetras, 7 Panda Corys
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post #6 of 10 (permalink) Old 09-19-2013, 04:12 PM
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DIY LEDs!


[50g][30g][18g][12g][11.4g][7.5g][7.13g][5.5g][4.1g][3g][2.1g] - [waterfall] [grow][pond]
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post #7 of 10 (permalink) Old 09-19-2013, 05:45 PM Thread Starter
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Quote:
Originally Posted by hello_rockview12 View Post
I asked the same question not long ago and I think the finnex ray 2 will do what you want. LEDs may be more upfront but it'll be cheaper in the long run due to not having to change bulbs every 6 months and lower power consumption.
I like the light, but am concerned with the spread since it's such a narrow fixture.
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post #8 of 10 (permalink) Old 09-20-2013, 08:58 PM
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I just asked this question a few weeks ago and heres what I narrowed it down to.

The finnex fixture posted above.

2 x 48" t5ho with good reflectors placed ~8" apart for good coverage (prob need to make a custom fixture to achieve this)

2 x t8 fixture

I am using the 2 x t8 with decent results I had 3 swords grow new leaves 2 days after being in the tank so they seem happy.

I think the t5ho would be the best bet for the coverage front to back and intensity, but since i had the t8 fixture I decided to stick with it.
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post #9 of 10 (permalink) Old 09-21-2013, 02:21 AM
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The T5HO would give you mid-low light with good coverge Aqualife has some good lights
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post #10 of 10 (permalink) Old 09-21-2013, 02:30 AM
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I have a PAR meter and a 75G tank. I had a 2X54W Tek T5 retro mounted in a canopy 6" above the water's surface with individual parabolic reflectors, when I tested the light I found it to be too high for my liking, so I removed the reflectors and painted the inside of the canopy White. Even with that setup I would say I'm in the medium light category, enough to grow glosso laying down, but not especially fast. Deep into CO2 territory.

It is worth mentioning that I have 2 T5 bulbs that put out 25% less light than the bulbs I'm using now, so not all bulbs are created equal.

I also have a really good T8, on an electronic ballast and that bulb alone puts off 25 par at the substrate, this would be enough for anubus, Java Fern, and no CO2.

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