dosing larger tanks, how much ferts do you go through? EI, DIY solutions - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 09-22-2014, 02:15 PM Thread Starter
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dosing larger tanks, how much ferts do you go through? EI, DIY solutions

I have a 125g with 40g sump... approximately 150g in the whole system.

My tank is high light, co2, ferts, blah blah blah.

The dosing calculators I use end up either requiring more solid ferts than are soluble in 1000ml, or require 100ml doses (every other day)

Personally, I don't want to have to mix ferts up every ~20 days. But I guess that's not that big of a deal. I'm just wondering if other folks with larger tanks are going through so the same pains as I am.


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post #2 of 12 (permalink) Old 09-22-2014, 03:04 PM
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For a 155 gallon tank I just mix the dry ferts in a cup of water every day.
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post #3 of 12 (permalink) Old 09-22-2014, 03:23 PM
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You should be able to make a mixture that will provide roughly 20 doses(50ml per day) in that 1000ml container pretty easily. What and how much of each are you mixing?
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post #4 of 12 (permalink) Old 09-22-2014, 03:59 PM
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I have a low tech 40gal, I went to wallymart bought 2X 7 day pill planners, I sit down every 3rd week and measure out dry ferts into those, open up the day of the week sprinkle it in the tank just like feeding the fish
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post #5 of 12 (permalink) Old 09-22-2014, 07:59 PM Thread Starter
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Quote:
Originally Posted by aclaar877 View Post
For a 155 gallon tank I just mix the dry ferts in a cup of water every day.
doing it manually is just not in the cards after programming my own aquarium controller haha

Quote:
Originally Posted by nilocg View Post
You should be able to make a mixture that will provide roughly 20 doses(50ml per day) in that 1000ml container pretty easily. What and how much of each are you mixing?
honestly, I don't know exact amounts off the top of my head because I run the calculator every damn time. I think I can get away with 60ml doses... I'm a fool for trying to get 15ml doses in.

Potassium Sulfate
Potassium Nitrate
Magnesium Sulfate
Monopotassium Phosphate

Quote:
Originally Posted by FatherLandDescendant View Post
I have a low tech 40gal, I went to wallymart bought 2X 7 day pill planners, I sit down every 3rd week and measure out dry ferts into those, open up the day of the week sprinkle it in the tank just like feeding the fish
thanks?


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post #6 of 12 (permalink) Old 09-22-2014, 09:16 PM
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Originally Posted by scapegoat View Post
honestly, I don't know exact amounts off the top of my head because I run the calculator every @#!*% time.
Another thing I did is use the caculator but put the numbers into a excel spread sheet next to the fert. Open the SS and all the measurements I need to make are right there at the tip of my fingers
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post #7 of 12 (permalink) Old 09-22-2014, 09:25 PM
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Originally Posted by scapegoat View Post
doing it manually is just not in the cards after programming my own aquarium controller haha



honestly, I don't know exact amounts off the top of my head because I run the calculator every damn time. I think I can get away with 60ml doses... I'm a fool for trying to get 15ml doses in.

Potassium Sulfate
Potassium Nitrate
Magnesium Sulfate
Monopotassium Phosphate



thanks?

Most likely the issue that you are having is that you are using the calculator for kno3(calculating for nitrogen) and kh2po4(calculating for phosphate). Then when you go to calculate the k2so4 you add enough to get enough potassium without taking into account that you have already added a bunch with kh2po4 and kno3.
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post #8 of 12 (permalink) Old 09-22-2014, 09:36 PM
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Quote:
Originally Posted by nilocg View Post
Most likely the issue that you are having is that you are using the calculator for kno3(calculating for nitrogen) and kh2po4(calculating for phosphate). Then when you go to calculate the k2so4 you add enough to get enough potassium without taking into account that you have already added a bunch with kh2po4 and kno3.
This is the problem I designed my fertilizer spreadsheet to address. It allows you to work out the combined effect of the various fertilizers.

Last edited by conklech; 09-22-2014 at 09:37 PM. Reason: fix link again
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post #9 of 12 (permalink) Old 09-23-2014, 12:11 AM
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I agree with Nilocg. The K2SO4 is the least soluble and does not require a "full" EI dose. KNO3 provides the bulk of potassium. If you want to add it to equal EI recommendations you only need about 2.25ppm.

If you want all the doses the same here are the amounts to add to 1,000ml for full EI dosing of everything, including potassium. Included is a total of what your dosing with one dose of each fertilizer.


NO3 7.5
N 1.694
PO4 1.3
P 0.424
K 7.514
Fe 0.5
Mg 0.107
dGH 0.025
Cu 0.007
B 0.061
Mn 0.143
Mo 0.004
S 0.923
Zn 0.028



(x1) KNO3 231.459 gm (approximately 44 1/2 teaspoons)
(x1) KH2PO4 35.256 gm (approximately 6 1/4 teaspoons)
(x1) K2SO4 94.903 gm (approximately 14 3/4 teaspoons)
(x1) Plantex CSM+B 144.925 gm (approximately 33 3/4 teaspoons)


The levels above are for a 150 gallon tank using a container size of 1000 ml and a dose size of 30 ml.
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post #10 of 12 (permalink) Old 09-23-2014, 08:42 PM Thread Starter
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Quote:
Originally Posted by Zorfox View Post
I agree with Nilocg. The K2SO4 is the least soluble and does not require a "full" EI dose. KNO3 provides the bulk of potassium. If you want to add it to equal EI recommendations you only need about 2.25ppm.

If you want all the doses the same here are the amounts to add to 1,000ml for full EI dosing of everything, including potassium. Included is a total of what your dosing with one dose of each fertilizer.


NO3 7.5
N 1.694
PO4 1.3
P 0.424
K 7.514
Fe 0.5
Mg 0.107
dGH 0.025
Cu 0.007
B 0.061
Mn 0.143
Mo 0.004
S 0.923
Zn 0.028



(x1) KNO3 231.459 gm (approximately 44 1/2 teaspoons)
(x1) KH2PO4 35.256 gm (approximately 6 1/4 teaspoons)
(x1) K2SO4 94.903 gm (approximately 14 3/4 teaspoons)
(x1) Plantex CSM+B 144.925 gm (approximately 33 3/4 teaspoons)


The levels above are for a 150 gallon tank using a container size of 1000 ml and a dose size of 30 ml.
that might all explain why I don't quite remember mixing in so damn much.

What tool did you use to calculate that?


Quote:
Originally Posted by conklech View Post
This is the problem I designed my fertilizer spreadsheet to address. It allows you to work out the combined effect of the various fertilizers.

thank you, I saved that.


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post #11 of 12 (permalink) Old 09-23-2014, 09:14 PM
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Quote:
Originally Posted by scapegoat View Post
that might all explain why I don't quite remember mixing in so damn much.
Lol


Quote:
Originally Posted by scapegoat View Post
What tool did you use to calculate that?
I used the one I'm writing for Windows. It's far from done but you can try if you like. Download from this page. Yet another nutrient calculator will do the job as well. I just like seeing everything I'm dosing in one list among other things I'll add whenever I have the spare time.
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post #12 of 12 (permalink) Old 09-25-2014, 11:19 PM
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Quote:
Originally Posted by Zorfox View Post
Lol




I used the one I'm writing for Windows. It's far from done but you can try if you like. Download from this page. Yet another nutrient calculator will do the job as well. I just like seeing everything I'm dosing in one list among other things I'll add whenever I have the spare time.
I downloaded Zorfox application, which is great, but need some help understanding what I need to dose still. I have 180 gallon tank, with 65 gallon sump, so I based mine on 245 gallons.

The tank is high tech with CO2.
I plan to dose the following:

KN03
CSM+B
Fe 13 %
KH2P04

So what I can figure is the following, do you guys think it correct, and if so one thing I am not clear on, do I need to dose them each day? I will dry dose.

2 1/8 teaspoons KN03
1 3/4 teaspoons CSM+B
3/4 teaspoon Fe 13 %
1/4 teaspoon KH2P04

Thanks so much

Last edited by FishStix; 09-25-2014 at 11:21 PM. Reason: .
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