Does anyone know how to make EI solutions without a scale? - The Planted Tank Forum
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post #1 of 22 (permalink) Old 01-05-2014, 03:58 AM Thread Starter
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Does anyone know how to make EI solutions without a scale?

I only have teaspoons to measure with me right now since I left my scale in another city. Does anyone know how to make a solution this way?

My estimate is that I need about 2 tablespoons of KNO3 per 500ml of water to get the amount of fertilizer I want.

Last edited by Jeffww; 01-05-2014 at 04:13 AM. Reason: tbsp to kno3
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post #2 of 22 (permalink) Old 01-05-2014, 04:22 AM
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Quote:
Originally Posted by Jeffww View Post
I only have teaspoons to measure with me right now since I left my scale in another city. Does anyone know how to make a solution this way?

My estimate is that I need about 2 tablespoons of KNO3 per 500ml of water to get the amount of fertilizer I want.
See Wet's Dosing calculator, he has weight or teaspoons.




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post #3 of 22 (permalink) Old 01-05-2014, 07:24 AM
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I don't think wet's calc has teaspoon. Give me the weight and I'll convert it to teaspoon for you.


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post #4 of 22 (permalink) Old 01-05-2014, 08:04 AM
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I got this from a source which I have no idea if it is credible or not.
But they say that 1 teaspoon = .48 grams
With this small of a starting point, it should be noted that the farther away you get, meaning the larger the quantity
the more chance for error IF rounding off the numbers.
It would therefor be safe for me, since the calculator says .843 grams is the suggested dose, If I were to use
1.5 teaspoons or 3 x 1/2 teaspoons(level) as it is close enough.
But if you have a 90g tank and therefor a much larger dose, you might get out a calculator.
But even so, as my tank hasn't had decent ferts, and I am paranoid due to a BGA thing a while back from organics,
I Further cut the total to be on the safe side for the first few weeks. Thus this is my fert list/doses for my ten G tank per week.
KNO3...1/4 teaspoon
KH2PO4...1/64th teaspoon per week
K2SO4...1/4 teaspoon per week these are the Macros...
Flourish Comprehensive is the Micros x 2ml per week
This was/is only a "safe" starting point.

The shortest distance between any two points is a straight line...in the opposite direction...
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post #5 of 22 (permalink) Old 01-05-2014, 08:28 AM
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Quote:
Originally Posted by Raymond S. View Post
I got this from a source which I have no idea if it is credible or not.
But they say that 1 teaspoon = .48 grams
1 teaspoon of what? Densities vary for different chemicals.

1 teaspoon = 5 mL = 5 grams (for water).

I doubt that 1 teaspoon of any of the chemicals we use will equal 0.5 grams.

Anthony


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post #6 of 22 (permalink) Old 01-05-2014, 09:18 AM
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Quote:
Originally Posted by Darkblade48 View Post
1 teaspoon of what? Densities vary for different chemicals.

1 teaspoon = 5 mL = 5 grams (for water).

I doubt that 1 teaspoon of any of the chemicals we use will equal 0.5 grams.
I 100% agree...that was one of the reasons I said I have no idea if it is credible. I on the other hand, would like a link to that
calculation mentioned that may give it in teaspoons also so I can compare them. Since I did this in a quote I can't go back and
get his name for you.

Another tricky part, which is the reason to use a scale, is that g or mg is a weight while teaspoon is a volume.
But is there a place where you can get a reasonably good scale for under $900...LOL...because that calculator said
that I should dose 843mg(K2SO4) and I'd like to see how it compares to that method I gave so that I can know next time.
And yes I'd need to check each fert as one is likely far less weight than the others per set volume.
P.S. I just looked up the "wet's calculator" and it don't give teaspoons...

The shortest distance between any two points is a straight line...in the opposite direction...

Last edited by Raymond S.; 01-05-2014 at 09:25 AM. Reason: P.S.
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post #7 of 22 (permalink) Old 01-05-2014, 11:47 AM
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Quote:
Originally Posted by mistergreen View Post
I don't think wet's calc has teaspoon.
It does. Calculate for "the result of my dose".

http://calc.petalphile.com

For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring.
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post #8 of 22 (permalink) Old 01-05-2014, 11:49 AM
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I make saturated solutions, ie: the point at which a solution of a substance can dissolve no more of that substance and additional amounts of it will appear as solid crystals.
The maximum concentration strictly depends on the temperature, but varies only by a few per cent either way, meaning that any saturated solution - within our temperature range of use - can be regarded as a fixed concentration.

Regards
Cor

Last edited by Greystoke; 01-05-2014 at 12:00 PM. Reason: .
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post #9 of 22 (permalink) Old 01-05-2014, 12:09 PM
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post #10 of 22 (permalink) Old 01-05-2014, 12:21 PM
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Quote:
is there a place where you can get a reasonably good scale for under $900
You can get digital gram scales for less then $10.00. Amazon, Target, etc... Try the kitchen dept.
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post #11 of 22 (permalink) Old 01-05-2014, 01:54 PM
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Quote:
Originally Posted by Jack Gilvey View Post
It does. Calculate for "the result of my dose".

http://calc.petalphile.com
+1

The weight per teaspoon is listed for every fertilizer in that calculator here.
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post #12 of 22 (permalink) Old 01-05-2014, 02:01 PM
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Quote:
Originally Posted by Jack Gilvey View Post
It does. Calculate for "the result of my dose".

http://calc.petalphile.com
OK so I'm thinking both of these questions are very important to making a list of that which I intend to dose.

#1 On that calculator it does not indicate this. This is an example. It might occur with two different ferts other than these.
If I dose KNO3 @ 1/4 teaspoon and K2SO4 @ 1/4 teaspoon obviously the potassium(the K) in these will compound.
So how do I tell what the results will be ? Above the slide bar looking picture, there is a list of what ppm each
mineral will be. Should I add the number from the KNO3 to the number from the K2SO4 to get the final result ?

#2 Where can I find a list/chart that will tell me what my target ppm should be for each nutrient.

#2b Is that target for heavily planted/CO2 tanks ?

I am sure that the person who started this thread will want answers for these questions as do I.

Quote:
Originally Posted by Zorfox View Post
+1

The weight per teaspoon is listed for every fertilizer in that calculator here.
Awesome...

The shortest distance between any two points is a straight line...in the opposite direction...

Last edited by Darkblade48; 01-06-2014 at 12:46 AM. Reason: Back to back posts
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post #13 of 22 (permalink) Old 01-05-2014, 02:22 PM
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Quote:
Originally Posted by Raymond S. View Post
#1
If I dose KNO3 @ 1/4 teaspoon and K2SO4 @ 1/4 teaspoon obviously the potassium(the K) in these will compound.
So how do I tell what the results will be ? Above the slide bar looking picture, there is a list of what ppm each
mineral will be. Should I add the number from the KNO3 to the number from the K2SO4 to get the final result ?
Yes, add the ppm of K.

Quote:
Originally Posted by Raymond S. View Post
#2 Where can I find a list/chart that will tell me what my target ppm should be for each nutrient.
EI target ranges
CO2 range 25-35 ppm
NO3 range 10-30 ppm
K+ range 10-30 ppm
PO4 range 1.0-2.0 ppm
Fe 0.2-0.5ppm or higher
GH range 1-2 degrees "extra" 17-40 ppm or higher

The list above is from this post at the Barrreport, EI light: for those less techy folks

Quote:
Originally Posted by Raymond S. View Post
#2b Is that target for heavily planted/CO2 tanks ?
I realize those levels are generally used for high light setups. The way I see it is that plants still need non-limiting nutrients regardless of light. Since we won't see any problems with these levels at any light level I think it is safe to assume the levels are safe for any setup.

A problem arises when people dose excess nutrients in low tech tanks that do not receive regular water changes. So the dosing regime has to be altered to account for this. The uptake ratio simply isn't as high.
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post #14 of 22 (permalink) Old 01-06-2014, 03:21 AM Thread Starter
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Wet's calc has an option to use teaspoons but it's sort of hidden in the drop down menus. I didn't know about it before I made the thread. You need to select:

>diy
>500ml container
>X dose amount
>result of my dose
># of tsp
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post #15 of 22 (permalink) Old 01-06-2014, 03:52 AM
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Where is result of dose? I still can't find it. Oh well.


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