Would mixing different LED colors look bad?

MantisShrimpMan

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I’m currently in the planning stages of coral stocking- I need to get my light and make sure my tank is keeping corals happy before I fully go ahead. With that said… I have a bit of an unusual idea and I could use some input on how to best attempt to have it come out successful.

My aquascape is an arch structure that was built on a large 1” thick milled foundation rock. So (turn them 90 degrees) my arch is actually a “D”, not a “)”. Given that it has the foundation rock, the room under the arch is stone, not sand bed. And considering that I’m working with a relatively small tank (20G), I’d love to be able to use said space for the addition of more corals.

Unfortunately, the arch does shade the foundation rock quite a bit. However, I believe that MAYBE by both using a bit of supplemental underwater lighting and choosing corals that aren’t particularly light demanding, I could perhaps successfully keep corals under the arch. I’ve been looking at submersible LED solutions, like the ones offered for refugium lighting by tunze and AuqaGadget, and it led me to stumbling across submersible LED rings used for lighting fountains. There are a few offerings along those lines that are actually small enough for me to conceal them into the “roof” of the arch aquascape. Now, these LEDs may not pump out the same PAR numbers that an actual aquarium light does, but I’m moreso looking for them to just help with reducing the shading, not act as standalone lighting. As for the corals, I’ve been looking at corals that are known for being the least light demanding, like cyphastrea, leptos, Zoas. Heck, id even go as far as to include NPS corals in that stocking list, with the logic of “sure, they might not be photosynthetic, but you still want to light them to show off how cool they are!”

Now, here’s where mixing LEDs comes into consideration. The fountain lights I’m looking at don’t come in multicolor options. While I suppose I can put multiple into my rockwork to compensate for this, generally speaking, they’re either blue or a cool white (about 5000K). I tend to prefer the majority of a tank to be closer in appearance to natural sunlight. That being said, I can’t deny that zoa’s and other neon corals look amazing under purely actinic blue.

So, if I were to have the main light be a mix of blues and other channels, while only having a blue channel under the arch, would that look ridiculous? I’ve made a drawing for reference, although I will admit, it is a GROSS oversimplification.
DC6B0F07-A89C-4D29-9D38-7ED48C1CAA2C.jpeg


The other thing I‘m wondering about is maybe combining these fountain ring lights concentrically. For example, one company has a 12 LED and a 6 LED model, and the 12 LED model has Outer diameter 2” and inner diameter 1.25”, and the 6 LED model has O.D. 1.25” and I.D. 0.5”. If one ring was blues and the other was whites, and I wired in dimmer switches, it should theoretically allow me some control over the resulting tone of the arch lighting.
18DEC633-C51B-45F0-AA78-27D4E871A2B2.jpeg

If I were to resort to this, would you make the stronger outside light the blue one or the white one, and why?

Overall, I’d like to provide light to the underside of the arch so I can have something like a fluorescent Zoa garden below, but I don‘t want it to look visually unappealing by mixing substantially different color tones.
 

Jekyl

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Are you sure the lights you're talking about are meant for coral? Simple color of the lens doesn't make the difference.
 
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MantisShrimpMan

MantisShrimpMan

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Are you sure the lights you're talking about are meant for coral? Simple color of the lens doesn't make the difference.
They’re not meant for coral by any means. Meant for adding that lighted appearance to fountains and other architectural water features at night. The primary light in my aquarium is meant for coral, these are simply an effort to reduce the harsh shading so I can keep some low light zoas underneath the arch
 

Jekyl

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They’re not meant for coral by any means. Meant for adding that lighted appearance to fountains and other architectural water features at night. The primary light in my aquarium is meant for coral, these are simply an effort to reduce the harsh shading so I can keep some low light zoas underneath the arch
What about some orphek bars or reefbrite?
 

Jekyl

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But neither would be waterproof. Im suggesting adding submerged lights in the arch to target the exact areas that are otherwise being shaded.
I see, my mistake.
 
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MantisShrimpMan

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I see, my mistake.
No worries, you’re fine.

The specific lights I was looking at were the Ocean Mist G1 fountain lights on pondandgardendepot.com I was gonna put the 24 LED blue one with the 12 led white one. This is the link to the exact products Im describing: https://www.pondandgardendepot.com/ocean-mist-g1-led-light-rings-various-sizes-colors/

I spoke to someone at the website HQ and he suggested if I wanted to ensure their safety in a saltwater tank long term I’d need to seal them before putting them in. They do appear to have either an aluminum or steel body, and despite being waterproof, I agree that it would require the extra measure to ensure you don’t end up poisoning your tank via galvanic corrosion or something like that. If I were to follow through with this, after having scoured older forum posts and consulted with William in customer service at BRS, I could use a 2 part epoxy as a means of sealing the LEDs. Specifically, the one I stumbled across that appears appropriate for such a task is Polygem 1319. Quick thanks to @Bigbass (who appears to be no longer active) for having made that suggestion in a discussion on this forum a while back.

The discussion: https://www.reef2reef.com/threads/making-action-figures-tank-safe.569798/
The product link: https://polygem.com/product/1319-clear-epoxy-coating/

Ultimately, I decided that before I go ahead with a solution that would turn into a decent amount of time on DIY and spending at least $125 between the 2 lights, the sealant, shipping, etc, that the safer bet was to go with a cheaper version as a bit of a test run. I found a similar fountain ringlight on eBay that mentioned saltwater tank usage in it’s description and also mentioned the shell was made out of ABS plastic, which I believe to be reef safe and also does not have the same inherent corrosion risks that a similar light with a metal housing would possess. Here’s the link to the one I found:


Another thing that occurred to me was that assuming I were to pursue this with the Ocean Mist G1 lights, I could be defeating the whole purpose of using this as SUPPLEMENTAL light. Having two decenot LED rings, even if they weren’t completely designed for coral growth, mere inches away from the zoa garden they were intended for could, for all I know, end up being overpowering. Not to mention- The outer diameter of the larger ring was 2.625” with the 24 LED Ocean Mist G1, whereas the outer diameter of this ebay alternative is only 2.0”, so it should prove a bit easier to conceal into the rockwork.

Generally speaking, having entered this hobby from a scuba background, my preference leans towards replicating natural light. While I appreciate the fluorescence of all the cool designer corals, I generally avoid the entirely blue lighting look for my own applications. I know that with my main light, when it arrives in about a week, I will be running it with a blend of both actinic blue AND warmer channels. However, for the area under the ledge, if all I’m gonna do is set up one big neon Zoa garden, then I might as well at least try out an only blue solution. It wont affect the aesthetic of the rest of the tank, but it could add a ton of pop to an area of my scape that would otherwise not even host corals.

Anyways, I’ll report on my findings and results, but I’ve provided all the links even to the stuff I ended up not using as of yet, so if anyone else is interested in such a project, hopefully this page assists them!
 
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