Best Dosing Time - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 08-21-2015, 05:42 AM Thread Starter
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Best Dosing Time

Hi Guys, want to have your opinion.
Which one better ? Dosing Fert before lighting on or after ?

Thanks

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post #2 of 9 (permalink) Old 08-21-2015, 06:02 AM
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Dosing time

Always dose before light and co2 come on. You can even dose at night after lights and co2 go off.


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post #3 of 9 (permalink) Old 08-21-2015, 08:21 AM Thread Starter
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Thanks Rick. Any reason behind that ?

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post #4 of 9 (permalink) Old 08-21-2015, 10:12 AM
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Would want to see that CO2 and fertz were at optimum level's before light's come on and plant's begin to use both in earnest.
I normally dose at night so water has a chance to clear before light's on as my water sometimes look's a bit milky right after adding the dry fertz.
By daylight,or light's on,,the tank has cleared to my satisfaction.
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post #5 of 9 (permalink) Old 08-21-2015, 11:00 PM Thread Starter
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Thanks Road

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post #6 of 9 (permalink) Old 08-22-2015, 12:43 AM
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If a tank utilizes the EI method of fertilization which is non-limiting then it's irrelevant as to when you dose because you are always providing more than enough to meet the plants needs.


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post #7 of 9 (permalink) Old 08-22-2015, 01:21 AM
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Reasoning

Quote:
Originally Posted by futabagus8 View Post
Thanks Rick. Any reason behind that ?

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Your plants start doing there thing as soon as the lights come on , and they have everything they need .


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post #8 of 9 (permalink) Old 08-22-2015, 01:49 AM
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Quote:
Originally Posted by FatherLandDescendant View Post
If a tank utilizes the EI method of fertilization which is non-limiting then it's irrelevant as to when you dose because you are always providing more than enough to meet the plants needs.
+1... and more..

Fertilizers aren't needed by plants for the process of photosynthesis... So it *REALLY* doesn't matter if the lights are on or not when you dose fertilizers.

Photosynthesis uses CO2, H2O and light to produce sugar. End of story. There are no other consumables involved in the process.

Fertilizers come in to allow the plant to grow and repair itself. They contain the nitrogen needed to form proteins, the iron to make new cholorophyl, etc, etc.. You can't make more plant, or refresh dying cells in the existing plant structure without them. You also need energy (from the sugar) and longer hydrocarbons (from more sugar), so photosynthesis does also play a role in growth too.

But plants grow ALL DAY.. They grow when the lights are on, and grow when the lights are off. We all know plants respire, producing CO2 instead of O2, at night. You know why?. They're busy burning that sugar made during the day to grow. During the day the growth and respiration still goes on, but if the lights are on, photosynthesis outpaces it, so there's no CO2 being output...

Moral of the story: plants need fertilizers and water all the time. The only light-linked resource plants needs is CO2.

New to planted tanks, avid gardener/tinkerer.

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post #9 of 9 (permalink) Old 08-22-2015, 03:37 AM Thread Starter
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Mattinmd, really great explanation. Many Thanks.

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