Do you have to dose fertilizer everyday? - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 01-26-2013, 05:11 AM Thread Starter
Algae Grower
 
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Location: Washington DC
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Do you have to dose fertilizer everyday?

I just started my first planted tank. 30G fresh water. I have T5 10000K 42W lighting. No CO2.
I have Cobomba caroliniana, hairgrass belem, Helanthium tenellum, Vesuvius and some Fissidians and Flame moss.

I am trying to understand all dosing before I buy all fertilizers. This is what seems to be the consensus.

20~40gal
50% H20 change-weekly
1/4 Tsp-KN03 3x a week
1/16 Tsp-KH2P04 3x aweek
1/2 Tsp-GH booster once a week
5ml or 1/16Tsp-Trace 3x a week

Questions:
1. If we do a mix of micro and macro every other day.. That's dosing everyday. Is that really necessary? Can plants really use up all the nutrients in a day?

2. Also, does it require 50% PWC? Some say 25%, some 50%.. Any points on that?

3. I am planning to use Flourish Excel. Is this good enough for carbon to live without CO2?

Thanks!
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post #2 of 5 (permalink) Old 01-26-2013, 06:59 AM
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Quote:
Originally Posted by greenaqua View Post
I just started my first planted tank. 30G fresh water. I have T5 10000K 42W lighting. No CO2.
I have Cobomba caroliniana, hairgrass belem, Helanthium tenellum, Vesuvius and some Fissidians and Flame moss.
If that is T5HO lighting, that is a lot of light to not be dosing and not injecting CO2 (I would reduce the lighting until you get CO2 and fertilization).

Quote:
Originally Posted by greenaqua View Post
Questions:
1. If we do a mix of micro and macro every other day.. That's dosing everyday. Is that really necessary? Can plants really use up all the nutrients in a day?
In a high light aquarium, plants can use up nutrients very quickly. The dosing regime you have posted appears to be EI, and the goal of EI is to achieve a stable level of (excess) nutrients so that they are always available to plants.

Quote:
Originally Posted by greenaqua View Post
2. Also, does it require 50% PWC? Some say 25%, some 50%.. Any points on that?
Classic EI requires 50% water changes in order to keep the levels of nutrients down.

Quote:
Originally Posted by greenaqua View Post
3. I am planning to use Flourish Excel. Is this good enough for carbon to live without CO2?
In a high light aquarium, CO2 is much better. Excel is more suited for low/medium light aquariums where the carbon requirements of plants are less.

In addition, Excel can become quite costly in the long run.

Anthony

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Last edited by Darkblade48; 01-26-2013 at 08:44 AM. Reason: Fixing code
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post #3 of 5 (permalink) Old 01-26-2013, 08:10 AM
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Location: Queens, NY
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Quote:
Originally Posted by greenaqua View Post
Questions:
1. If we do a mix of micro and macro every other day.. That's dosing everyday. Is that really necessary? Can plants really use up all the nutrients in a day?

2. Also, does it require 50% PWC? Some say 25%, some 50%.. Any points on that?

3. I am planning to use Flourish Excel. Is this good enough for carbon to live without CO2?

Thanks!

1) No, they cant, but that's the whole point.

2) 50% is just a nice round number we use and it prevents a crazy excess build up.

3) Excel is helpful. Pressurized CO2 is the best.
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post #4 of 5 (permalink) Old 01-26-2013, 03:20 PM
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You don't have to dose daily, it just seems nicer for the critters in the tank. Play with this nifty calculator to see how things change with water changes of different %.
http://calc.petalphile.com/
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post #5 of 5 (permalink) Old 01-26-2013, 05:00 PM Thread Starter
Algae Grower
 
Join Date: Jan 2013
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Thank you guys for the tips.

Does this high dosing affect fish? I am planning to add Neon Tetra after a month or so.. But plants are primary.
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