125G Tall Lighting Issues - The Planted Tank Forum
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post #1 of 8 (permalink) Old 09-24-2020, 03:09 PM Thread Starter
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125G Tall Lighting Issues

SO during the covid lockdown, I decided to get back into the hobby. I had a 125G tall tank sitting in my garage, so I built a new stand, and bought some 100w Solla flood lights https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 and attached them to a shelf right above the tank. I decided to try a dirted tank, with black beauty regular as my cap. I started with a dry start, and planted Monte Carlo and Taiwan Moss. I had to proceed to flooding the tank about 4 weeks after, and thus the problems started. Really during the dy start, the plants didn't seem to take off either. After I flooded most of my monte carlo melted, and I am left with some new growth but not much. This tank is using CO2 injection, with a custom Cerges Reactor and a Fluval FX6 filter. I am thinking the lights aren't powerful enough to get the right amount of light to the substrate. I do have plants on a large piece of drift wood closer to the lights, and they are pearling like crazy. I am open to all lighting suggestions, including DIY LED, Buy premade LED or T5HO. The plan is to have carpet, and heavily planted tank with Reds, Greens and the like. Thanks for your help

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post #2 of 8 (permalink) Old 09-24-2020, 06:01 PM
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That light isnt designed for a planted aquarium. Having the right spectrum is important and that light is just white. You need red, blue and green leds too.
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post #3 of 8 (permalink) Old 09-24-2020, 06:16 PM Thread Starter
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SO just white 6500K won't cut it?

Bump: Would one Fluval Plant 3.0 48-60" handle a tank this width/depth?

Another Pre-built option I am looking at is an 8 lamp T5HO fixture. https://www.amazon.com/DoubleLux-DL8...-garden&sr=1-2 Would I need to swap out some of the 6500k bulbs with some other collors? Like 3000k Reds? https://www.amazon.com/Lightingwise-...KYJSX44T3D2KH2

Another option I am toying with is building a LED fixture from scratch. If I assume the Fluval Plant 3.0 would work then my price ceiling is $210.

I am very open to suggestion here. Thanks

Last edited by Darkblade48; 09-25-2020 at 10:07 PM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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post #4 of 8 (permalink) Old 09-24-2020, 09:23 PM
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Quote:
Originally Posted by bubbaray_00 View Post
Another Pre-built option I am looking at is an 8 lamp T5HO fixture. https://www.amazon.com/DoubleLux-DL8...-garden&sr=1-2 Would I need to swap out some of the 6500k bulbs with some other collors? Like 3000k Reds? https://www.amazon.com/Lightingwise-...KYJSX44T3D2KH2

Another option I am toying with is building a LED fixture from scratch. If I assume the Fluval Plant 3.0 would work then my price ceiling is $210.

I am very open to suggestion here. Thanks
A 125 gallon tall is 60 x 18 x 25 Tall right?
The 60" length will make it difficult to get good uniform light from the Plant 3.0, plus you would need 2x the strips because of the 18" width.
For the length of the tank and the width you're probably looking at staggering 4 36" strips, 2 front 2 back to get good light distribution. The issue is whether or not the plant 3.0 can penetrate the depth of the tank effectively.

I would either go DIY COB LED using a mixture of Luxeon fresh fish, and Luxeon Crisp white outlined in this post. Or to go with a 60" T5ho fixture which have a 57" 80watt bulb option.
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post #5 of 8 (permalink) Old 09-24-2020, 09:56 PM
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Need to shoot for 70-120 w of led's A lot of your issues will be geometry problems.
Posting this link "just because" it fits
https://www.fishtanksdirect.com/life...ctrum-led.aspx

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post #6 of 8 (permalink) Old 09-25-2020, 01:39 AM Thread Starter
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you have the dimensions correct. 4x of the 36" Plant 3.0 will be cost prohibitive. I will look for 60" T5ho fixtures, as I didn't see any earlier. I fully expect to end up building something from scratch, but want to exhaust the buy option first. Thanks for your input.

Bump:
Quote:
Originally Posted by jeffkrol View Post
Need to shoot for 70-120 w of led's A lot of your issues will be geometry problems.
Posting this link "just because" it fits
https://www.fishtanksdirect.com/life...ctrum-led.aspx
Thanks, I was wondering on how much was enough, and how much would be too much. I think I may have two custom bars. I will review the LED build threads and see what I can come up with. One additional use case that is coming up, is ramp up and ramp down and possibly a night light. My youngest is always wanting to check on the fish. Having an appropriate photo period, but still have visible light to enjoy it but not grow algae would be nice.
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post #7 of 8 (permalink) Old 09-25-2020, 01:34 PM
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Its been my experience (and that of others) that these type of lights should do ok at growing plants. IIRC, plants are fairly opportunistic and will use what is available. Sure a tuned spectrum can grow plants better, but we are talking a marginal enhancement, not growing vs not growing. I think that your problem might be more of one of geometry. Can you raise your current lights any to give a better spread?
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post #8 of 8 (permalink) Old 09-26-2020, 10:31 AM Thread Starter
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Quote:
Originally Posted by Bunsen Honeydew View Post
Its been my experience (and that of others) that these type of lights should do ok at growing plants. IIRC, plants are fairly opportunistic and will use what is available. Sure a tuned spectrum can grow plants better, but we are talking a marginal enhancement, not growing vs not growing. I think that your problem might be more of one of geometry. Can you raise your current lights any to give a better spread?
I originally started with the lights spaced higher both during dry start
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and for most of the time after flooding. I just recently moved the lights down thinking it was too far, and thus the plants needed them closer.
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