Need help with red plants and light - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 01-13-2021, 03:55 AM Thread Starter
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Need help with red plants and light

I need you guys to help me pick up a light. But first, let me give you background information.
Its a 20G long tank. From substrate to the lid, its about 11 inches. I am injecting CO2, at the rate of pH drop of 1.1. Its a dirted tank, capped with blasting sand. Initially, I started off with Finnex Ray II but had an accident so on December 28th, I picked up 2 Finnex Planted+ 24/7 CRV lights. On Amazon, it says that it has True 660Nm RED LEDs. For ferts, I use EZ Green from aquarium coop.
At the moment, my tank has one half of the lid. The light in the front, it has to go through the glass lid. But the light in the back, its directly above the water. Thats where all my taller plants are. I have Rotala Blood red, Ludwigia Palustris, Ludwigia Peruensis, Ludwigia Natans, Rotala macrandra.
They are all growing very well. I have to trim them quite often. They are all bushy, and many of them growing laterally instead of vertically. I am happy with their growth. But they are mostly green. If you looked at them, you wouldnt know they are red plants.
So what am I doing wrong? I think I am getting around 60 PAR at the substrate level. But plants that are taller, and closer to the top, they should turn red, isnt it? Ludwigia Natans is nice red but nothing like what you see on google. Rest are just green with barely some touch of red. Am I really to think that 2 of these light is not enough?
So, based on all these information, what do you think is the reason? Wrong light? Wrong ferts? I ordered Thrive+. Should I wait longer since I got the light on 28th?
My CO2 comes on at 11, light at 1. Then CO2 turns off at 8 and light at 9. I added a video to give you an idea.
Attached Files
File Type: mp4 IMG_8110.mp4 (11.42 MB, 15 views)
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post #2 of 6 (permalink) Old Yesterday, 01:42 PM
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Seems to me from the video that your reds are coming across a little more brown.... which makes me wonder if itís just the spectrum of your light.

Not that youíre lacking power, but just that the lights arenít rendering those intense reds because itís just the wrong color temp to do so. Iím fairly certain that I have my light turned down at about or below 60 par (although I havenít measured in a long time) and I donít have trouble with most red plants. More demanding plants stay orange or pink in my setup though.

If you were to let one of the stems grow all the way to the surface of the water, does the red become more intense at that height?


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post #3 of 6 (permalink) Old Yesterday, 08:58 PM
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I've not dabbled into the intense red of plants before because it always seemed a lot of trouble. I believe its more then just using an all in one fert though. I believe people are rolling their own to get that way and are purposely depriving plants of nitrogen to get that intense red we see in some tanks. /shrug Like I said I haven't dabbled in it much and I think there is more then one way to make it happen but that might be something to research as you try to get this to work.

A question though, as the plants get closer to the surface do the tips turn more red?



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post #4 of 6 (permalink) Old Yesterday, 11:16 PM Thread Starter
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You know, I didnt think about rendering red part. That could be it. I am not sure what is the best settings for it. On the remote, there is a button called Max. So I assumed thats the highest output from all colors. Let me find more about it.
No, I have Ammania Gracilis about 2 inches from the light and its not showing much difference at the top compared to the bottom.

Bump: As noob, I want to stay away from Nitrogen starvation if I can as its a little advanced system.
No, I have Ammania Gracilis about 2 inches from the light and its not showing much difference at the top compared to the bottom.
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post #5 of 6 (permalink) Old Today, 12:51 AM
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If you try and use less green, yellow and warm white. Then boost your red, blue and/or cool white channels, that may help the red look less brown and more red.

Exact settings are highly dependent on the light, and many lights you canít even control in the right ways. I have no experience with your light, so I wouldnít be much help.

Generally speaking I use equal amounts Of red and blue, then about half of that amount in green.... thatís obviously for an RGB only light. Things change when youíre dealing with more channels.

Also, each light has a particular ďCRIĒ color rendering index. Itís my understanding that Some LEDs /lights just donít have the ability to render certain colors like others do.


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post #6 of 6 (permalink) Old Today, 01:55 AM
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Quote:
Originally Posted by shaonrahman View Post
You know, I didnt think about rendering red part. That could be it. I am not sure what is the best settings for it. On the remote, there is a button called Max. So I assumed thats the highest output from all colors. Let me find more about it.
No, I have Ammania Gracilis about 2 inches from the light and its not showing much difference at the top compared to the bottom.

Bump: As noob, I want to stay away from Nitrogen starvation if I can as its a little advanced system.
No, I have Ammania Gracilis about 2 inches from the light and its not showing much difference at the top compared to the bottom.



First thing I'd do ( I def don't chase red) is see what a cutting looks like in real daylight.
Second ignore a lot of the "enhanced" on line photos.
Third buy stock that is known to be very red w/out too much manipulation.
Fourth buy lights that fake colors ie some very colored t5's or RGB leds.
https://buceplant.com/products/amman...nt=34176500237
Quote:
Ammania gracilis displays wavy leaves that can be blush red to pale green, depending on light and nutrients available.
Ammania gracilis will display beautiful color given the proper conditions. It is recommended to supplement iron and micronutrients for these plants to see best growth and color. They will also exhibit the best color when nitrates are low, but phosphate and micronutrients are high. Ammania gracilis will grow best with CO2 levels around 25-30ppm. Soft and acidic water is preferred, but this plant is hardy and can adapt well to extreme conditions. Without sufficient lighting the plant will become pale green and lose its bottom leaves.

Most of your issue is prob "photo envy" and lack of spectrum trickery..

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