Liquid carbon in the morning - The Planted Tank Forum
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post #1 of 11 (permalink) Old 04-28-2019, 08:44 PM Thread Starter
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Liquid carbon in the morning

Hi
I have my lights turning on in the morning for 1.5 hrs so I can feed the fish. Lights are at 50%-ish.
I do inject CO2, but not turned on until several hours later.
As I don't want to crank CO2 to 30 ppm for 1.5 hrs, would adding some liquid carbon before this 1.5 hrs of light be a good idea?
Just a thought I had yesterday, and wanted some thoughts.
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post #2 of 11 (permalink) Old 04-28-2019, 09:26 PM
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Why not just shift the timing and/or adjust the rate for your pressurized C02?
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post #3 of 11 (permalink) Old 04-28-2019, 11:48 PM
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No, I don't really see a need to add the glutaraldehyde; there likely would be no benefit to your plants anyway
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post #4 of 11 (permalink) Old 04-29-2019, 08:30 AM
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Does it really take 1.5hrs to feed your fish?

Also donít understand need to wake up fish in middle of their night cycle to feed them.
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post #5 of 11 (permalink) Old 04-29-2019, 09:09 AM
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glutaraldehyde does not =Co2.
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post #6 of 11 (permalink) Old 04-30-2019, 12:37 PM Thread Starter
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Thanks for the replies, although some had nothing to do with the question.
I can ask in another way;
Would having a lighting period on 1.5 hrs without CO2, have any negative effect on the plants considering the lower lighting or does it depend on too many other factors?
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post #7 of 11 (permalink) Old 04-30-2019, 12:44 PM
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Quote:
Originally Posted by kilnakorr View Post
Thanks for the replies, although some had nothing to do with the question.
If we see things in your post that require advice, we will likely give that advice regardless if asked....

Quote:
Originally Posted by kilnakorr View Post
I can ask in another way;
Would having a lighting period on 1.5 hrs without CO2, have any negative effect on the plants considering the lower lighting or does it depend on too many other factors?
Yes, it will be an issue. Inconsistent CO2 is bad news for plants, good news for algae, and can be avoided by not having the lights on for the 1.5 hours.

Glut / Excel won't fix this as Glut / Excel is not CO2 and would't be consistent for the plants.
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post #8 of 11 (permalink) Old 04-30-2019, 01:23 PM
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If you are using CO2, there is no reason to use Glut for liquid carbon, but justifiable to dose Glut to control algae. I use CO2 and dose Glut after each weekly WC to control algae. For algae control, you need to dose the initial 5X rate after WC, not the daily 1x rate which is for carbon only. The high initial dosage can also prevent parasites outbreak as Glut is an ingredient of Seachem Paraguard.

I am wondering why you turn on the light 1.5 hour in the morning without CO2. Is it to provide light for morning feeding. It will confuse the rhythm of plants and encourage algae. Why not set the timer for split photo periods, say 4 hour in the morning and 4 hour in the evening with CO2. Plants and fish do better with consistent rhythm. I have split photo periods for all my tanks.
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post #9 of 11 (permalink) Old 04-30-2019, 06:36 PM Thread Starter
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I'm not looking algea control, but would like to avoid it.
If liquid carbon won't aid in this situation I won't add it.
My discus needs at least 30 min to wake up, and they eat pretty slowly which is the reason for the 1.5 hrs of morning light.
Getting my CO2 to 30 ppm takes quite some time, so not sure if splitting the light time 50-50 is a good idea.
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post #10 of 11 (permalink) Old 04-30-2019, 06:58 PM
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Quote:
Originally Posted by kilnakorr View Post
I'm not looking algea control, but would like to avoid it.
If liquid carbon won't aid in this situation I won't add it.
My discus needs at least 30 min to wake up, and they eat pretty slowly which is the reason for the 1.5 hrs of morning light.
Getting my CO2 to 30 ppm takes quite some time, so not sure if splitting the light time 50-50 is a good idea.
Can you feed them in the main photoperiod?

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post #11 of 11 (permalink) Old 04-30-2019, 07:37 PM
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How long does it take you to attain 30 ppm CO2. If it takes more than 4 hours, it has only marginal benefit because plants feed most heavily in the first 4 hours and then slow down to a stop in about 8 hours. So a split 4 hour photo periods is just as good as straight 8 hour provided that you provide at least 1 hour pre COs before turning on the light. Fish also grow faster in split feeding episode as anglers know that fish are most hungry in dawn and dust.
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