A check on my EI dosing - The Planted Tank Forum
Old 11-12-2015, 10:16 AM Thread Starter
Algae Grower

Join Date: Oct 2015
Posts: 35
A check on my EI dosing

I was using AquariumCalculators.com as reference

Still new to planted tank, therefore need someone to cross check if this dosage is ok.

My Tank is 2x1.5x1.5 (120L volume)
- With Substrate, I should be working on 100Litres
- With Lights and CO2 injection

Fertilizer
- Lushgro 5% KNO3 Solution (can't get hold of dry fert)
- KH2PO4 dry fert
- K2SO4 dry fert
- CSM+B dry fert

Dosage Method
- 1st Day: Water Change
- 2nd, 4th and 6th Day: KNO3 Solution & KH2PO4
- 3rd, 5th and 7th Day: K2SO4 & CSM+B

Calculation of 5% KNO3 Solution based on total of 3 dosage a week.

Calculation of the three dry fert based on total of 3 dosage a week.

Is the target N, P and K ok?

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Kaen130 is offline

Old 11-12-2015, 11:35 AM
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Quote:
Originally Posted by Kaen130 View Post
Is the target N, P and K ok?
No.

https://www.plantedtank.net/forums/11...explained.html
Quote:
CO2 range 25-35ppm
NO3 range 5-30ppm (KNO3)
K+ range 10-30ppm (K2SO4 or GH booster)
PO4 range 1.0-3.0 ppm (KH2PO4)
Fe 0.2-0.5ppm or higher (?) (Plantex CSM +B)
GH range 3 degrees ~ 50ppm or higher (GH Booster)
Those are the targets after a period of time with dosing and water changes. You're targeting those concentrations with each dose, which will mean you will have significantly higher concentrations.

A calculator such as this one, will show you the recommended dosage rates with the chemicals with EI.

Feel free to edit.
Audionut is offline
Old 11-12-2015, 11:46 AM Thread Starter
Algae Grower

Join Date: Oct 2015
Posts: 35
Quote:
Originally Posted by Audionut View Post
No.

https://www.plantedtank.net/forums/11...explained.html

Those are the targets after a period of time with dosing and water changes. You're targeting those concentrations with each dose, which will mean you will have significantly higher concentrations.

A calculator such as this one, will show you the recommended dosage rates with the chemicals with EI.

Hi, the photos I attached are dosing result for a week.

So to be exact
- 1st day water change
- 2nd, 4th and 6th Day: 32ml of KNO3 Solution and 0.43g of KH2PO4 each time
- 3rd, 5th and 7th Day: 1.03g of K2SO4
And 0.45g of CSM+B each time

Is this still too much?

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Kaen130 is offline

Old 11-12-2015, 11:51 AM
Planted Tank Guru

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Location: Hot Springs Ar. 71901
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It's fairly obvious that this calculator is asking for dry weight/measurements.
In the dry KNO3 you are adding 100% KNO3. In the solution you only have 5%.
And where did the figure 50gms come from ?
Don't know if this will help. Later in the day you might PM the person who made this
about the issue. My apprehension may be wrong so do check/w him.
But you can compare the amounts you have to the ones on his chart.
https://www.plantedtank.net/forums/11...n-recipes.html

The shortest distance between any two points is a straight line...in the opposite direction...
Raymond S. is offline
Old 11-12-2015, 11:55 AM
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Quote:
Originally Posted by Kaen130 View Post
Is this still too much?
Yes, unless you're changing a significant proportion of the water at water change (>70%).

The plants will not uptake that amount of nutrients each week, there will be left over in the water.

If you change 50% water, you reduce this remaining nutrient level by 50%, but then you are dosing a full amount again, so at the end of the second week you will have a higher concentration in the water. Then you only reduce 50% of the greater remaining nutrient level in the water, dose a full concentration again, etc, etc.

Feel free to edit.
Audionut is offline
Old 11-12-2015, 02:33 PM Thread Starter
Algae Grower

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Posts: 35
Quote:
Originally Posted by Raymond S. View Post
It's fairly obvious that this calculator is asking for dry weight/measurements.
There are 2 parts, 1 for dry weight, the other for stock solution.

Quote:
Originally Posted by Raymond S. View Post
In the dry KNO3 you are adding 100% KNO3. In the solution you only have 5%.
And where did the figure 50gms come from ?
The seller of the 5% KNO3 solution told me the 1000ml of solution contain 50g of KNO3.

Quote:
Originally Posted by Raymond S. View Post
Don't know if this will help. Later in the day you might PM the person who made this
about the issue. My apprehension may be wrong so do check/w him.
But you can compare the amounts you have to the ones on his chart.
https://www.plantedtank.net/forums/11...n-recipes.html

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Kaen130 is offline
Old 11-12-2015, 03:03 PM Thread Starter
Algae Grower

Join Date: Oct 2015
Posts: 35
A check on my EI dosing

Quote:
Originally Posted by Audionut View Post

So should I based on this? The 20-40gallon column?

Convert to grams and 5% KNO3 liquid.

Is this ok?

If still not ok, can anyone suggest a dosage?

I'm really new to this and hope things turn out well. Have been digging into articles for weeks for some of the basic knowledge before I come to this stage.

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Last edited by Kaen130; 11-12-2015 at 03:05 PM. Reason: wrong attachment
Kaen130 is offline
Old 11-12-2015, 05:21 PM
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This is the top of that link. First the suggested amounts of the normal nutrients.
The list is for a solution/w 500ml bottles. The first number is how much of that solution you dose. The second number is the tank size. I use the one for 10g tanks.

NO3 7.5 ppm
N 1.694 ppm
PO4 1.3 ppm
P 0.424 ppm
K 5.3 ppm (7.5 ppm with additional K2SO4)
Fe 0.5 ppm
Mg 0.107 ppm
dGH 0.025 ppm
Cu 0.007 ppm
B 0.061 ppm
Mn 0.143 ppm
Mo 0.004 ppm
S (0.917 ppm with additional K2SO4)
Zn 0.028 ppm

1ml/Gallon

KNO3 23.1 gm (approximately 4 1/2 teaspoons)
KH2PO4 3.5 gm (approximately 3/4 teaspoons)
Plantex CSM+B 14.5 gm (approximately 3 1/4 teaspoons)
Optional: K2SO4 9.4 gm (approximately 1 1/2 teaspoons)

Dry Dosing per 1 gallon
KNO3 46.3 mg (too small to use teaspoon measures)
KH2PO4 7 mg (too small to use teaspoon measures)
Plantex CSM+B 29 mg (too small to use teaspoon measures)
K2SO4 19 mg (too small to use teaspoon measures)

5ml/10 gallons

KNO3 46.3 gm (approximately 9 teaspoons)
KH2PO4 7 gm (approximately 1 1/4 teaspoons)
Plantex CSM+B 29 gm (approximately 6 3/4 teaspoons)
Optional: K2SO4 19 gm (approximately 3 teaspoons)
Dry Dosing
Optional: K2SO4 189 mg (approximately 1/32 teaspoons)
KNO3 463 mg (approximately 1/16 teaspoons)
KH2PO4 71 mg (too small to use teaspoon measures)
Plantex CSM+B 290 mg (approximately 1/16 teaspoons)

5ml/20 Gallons

KNO3 93 gm (approximately 17 3/4 teaspoons)
KH2PO4 14 gm (approximately 2 1/2 teaspoons)
Plantex CSM+B 58 gm (approximately 13 1/2 teaspoons)
Optional: K2SO4 38 gm (approximately 6 teaspoons)

Dry Dosing
Optional: K2SO4 377 mg (approximately 1/16 teaspoons)
KNO3 926 mg (approximately 1/8 teaspoons)
KH2PO4 141 mg (approximately 1/32 teaspoons)
Plantex CSM+B 580 mg (approximately 1/8 teaspoons)

The shortest distance between any two points is a straight line...in the opposite direction...
Raymond S. is offline
Old 11-13-2015, 02:11 AM Thread Starter
Algae Grower

Join Date: Oct 2015
Posts: 35
Thanks Raymond and Audionut.

I wonder why I can't access those links with Tapatalk.

I managed to access it with my safari.

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Kaen130 is offline
Old 11-13-2015, 06:15 AM Thread Starter
Algae Grower

Join Date: Oct 2015
Posts: 35
Quote:
Originally Posted by Raymond S. View Post
NO3 7.5 ppm
N 1.694 ppm
PO4 1.3 ppm
P 0.424 ppm
K 5.3 ppm (7.5 ppm with additional K2SO4)
Fe 0.5 ppm
Mg 0.107 ppm
dGH 0.025 ppm
Cu 0.007 ppm
B 0.061 ppm
Mn 0.143 ppm
Mo 0.004 ppm
S (0.917 ppm with additional K2SO4)
Zn 0.028 ppm

To based on these figures, dosage for my 100L per week.

Is this fine?

Read a bit about over supply of nutrient from the links. If I'm using ADA Aquasoil, do I still need to dose fert?

My tank has started for a week and did 50% water change daily.

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Old 11-13-2015, 02:27 PM
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Location: Gainesville, FL
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You are still not calculating for a single EI dose.

For your 100 liter tank the amounts to add for one dose are,

KH2PO4 186.2731 mg (approximately 1/32 teaspoons)
Plantex CSM+B 765.6968 mg (approximately 1/8 teaspoons)
K2SO4 496.3943 mg (approximately 1/16 teaspoons)

As far as your KNO3 solution are you sure it is 5% KNO3 and not 5% nitrogen? I've never seen a label that reports percentage of an ingredient. In fact, in the US that's illegal. Fertilizer analysis have to be reported as Nitrogen.

If it is indeed 5% KNO3 then you would add 24.5 ml for one dose. That 24.5 ml will provide 7.5 ppm of NO3 and 4.7373 ppm of potassium. Notice KNO3 provides quite a lot of Potassium. This is why I reduced the K2SO4 dose.
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Old 11-13-2015, 02:36 PM Thread Starter
Algae Grower

Join Date: Oct 2015
Posts: 35
Quote:
Originally Posted by Zorfox View Post
You are still not calculating for a single EI dose.

For your 100 liter tank the amounts to add for one dose are,

KH2PO4 186.2731 mg (approximately 1/32 teaspoons)

Plantex CSM+B 765.6968 mg (approximately 1/8 teaspoons)

K2SO4 496.3943 mg (approximately 1/16 teaspoons)

As far as your KNO3 solution are you sure it is 5% KNO3 and not 5% nitrogen? I've never seen a label that reports percentage of an ingredient. In fact, in the US that's illegal. Fertilizer analysis have to be reported as Nitrogen.

If it is indeed 5% KNO3 then you would add 24.5 ml for one dose. That 24.5 ml will provide 7.5 ppm of NO3 and 4.7373 ppm of potassium. Notice KNO3 provides quite a lot of Potassium. This is why I reduced the K2SO4 dose.

Thanks Zorfox for breaking down the number to per dosage =)

From what I found out, In Singapore 5% KNO3 contain is legal. Therefore this local company is making this solution to sell. He still carries KNO3 powder, but certain license must be shown in order to purchase.

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Old 11-13-2015, 02:40 PM
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Quote:
Originally Posted by Kaen130 View Post
Thanks Zorfox for breaking down the number to per dosage =)

From what I found out, In Singapore 5% KNO3 contain is legal. Therefore this local company is making this solution to sell. He still carries KNO3 powder, but certain license must be shown in order to purchase.

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Gotcha. Then those doses should be accurate.

In fact, if they were only using KNO3 then it's impossible to make a 5% nitrogen solution. The amount of KNO3 wouldn't dissolve. So this sounds very plausible.
Zorfox is offline

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