Dosing EI in 40 gallon tank? - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 04-17-2015, 06:00 PM Thread Starter
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Dosing EI in 40 gallon tank?

So my EI ferts arrived yesterday from GLA! I got those containers and I think they are actually quite nice for 6 dollars. I am going to pick up a set of measuring spoons from bed bath and beyond today, but I don't know what to dose.

Do I dose using the guidelines for a 20-40 gallon aquarium, or a 40-60 gallon one?

20-40 Gallon
¼ tsp KN03 3x a week
1/16 tsp KH2P04 3x a week
1/16 tsp K2S04
1/16 tsp (5ml) Trace Elements 3x a week
50% weekly water change
or
40-60 Gallon
1/2 tsp KN03 3x a week
1/8 tsp KH2P04 3x a week
1/8 tsp K2S04
1/8 (10ml) Trace Elements 3x a week
50% weekly water change
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post #2 of 10 (permalink) Old 04-17-2015, 06:13 PM
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I think you will have a hard time finding measuring spoons that can measure down to 1/16tsp accurately. I tried it and was really unhappy with the results. Check this link, this is how I dose now:

https://www.plantedtank.net/forums/sh...697&highlight=

For a 40 gallon, I would dose for the 20-40 to start with and if I notice deficiencies then bump things up. It is easier to add more if necessary. You have to do water changes to take it out, much more work.

Ben
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post #3 of 10 (permalink) Old 04-17-2015, 07:01 PM
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Quote:
Originally Posted by benealing View Post
I think you will have a hard time finding measuring spoons that can measure down to 1/16tsp accurately.
Actually very common: http://www.amazon.com/RSVP-Endurance-Stainless-Steel-Measuring/dp/B0006GNYM4/ref=sr_1_3?ie=UTF8&qid=1429297134&sr=8-3&keywords=smidgen+measuring+spoons
These measuring spoons provide an exact measurement for “smidgen”, “pinch”, and “dash”. Smidgen 1/32 tsp.; Pinch 1/16 tsp.; and Dash 1/8 tsp.
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post #4 of 10 (permalink) Old 04-17-2015, 07:26 PM
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Have you checked the accuracy of your spoons? I checked mine with a gram scale at work and the spoons were off by 10-20%. I don't like to guesstimate with fertilizers and using standard measuring spoons into a solution was much more to my liking. YMMV.

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post #5 of 10 (permalink) Old 04-17-2015, 07:30 PM
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I haven't...makes sense though


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post #6 of 10 (permalink) Old 04-17-2015, 10:12 PM
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I dose my CO2 injected 40b with;
1/4 tsp KN03 3x a week
1/4 tsp KH2P04 3x a week
1/4 tsp K2S04
1/8 tsp CSM+B

50% + - WC weekly


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post #7 of 10 (permalink) Old 04-17-2015, 10:25 PM
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If I could add my two cents. I have run ei on three different size tanks over the years. I have always dosed on the high side when choosing which schedule to follow. Remember the premise of ei is to add more than enough so you don't run out. Limiting a fert causes algae not having too much. Also remember that the method suggests two to three 50% water changes a week for the first few months on a new tank.
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post #8 of 10 (permalink) Old 04-18-2015, 12:58 AM
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I basically agree with everything that's been said. The need for most hobbyists to follow a certain "method" seems to cause a lot confusion IMO. People seem to be focused on exacting calculations as well as squabbling over numbers, levels and... the big one, "does too much really cause algae".

There's nothing wrong with wanting exact numbers and questioning things. However, many hobbyists fail to learn the "why we dose what we dose" lesson. Once we understand that it gets really easy and it just makes sense.

The range for error is huge if you do regular water changes which happens to be the single most influencing factor for nutrient management. Something to remember,... that "fine line" where nutrients become limiting is finite. When you hit it, plants become limited. Above that line...nutrient Nirvana.

I see hobbyists trying to fine tune their dosing everyday. Nearly every one of them do at least monthly water changes. My question is, why would we ever want to approach that "line"? There's nothing to gain from dosing just above limitation. We can dose 5 times (probably much more) what we normally dose in most cases without issue. Big margin for error there. So all we need to do is stay well above that limiting point and we're all good right?

Think about it this way. Water changes and dosing alone can be used for nutrient calculations. Forget plant density, light levels, CO2 or any other factor. PROVIDED we do regular water changes. If water changes eliminate build up then why can't we dose out low tech tanks the same dose?

The answer is we can!

As I said I hate "method" names. However, if we look past the "how to" of the EI method we can see the beauty. Dosing non-limiting nutrients has been around for nearly a century folks. That's the most efficient fertilizing method and probably always will be.
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post #9 of 10 (permalink) Old 04-19-2015, 08:58 PM Thread Starter
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Quote:
Originally Posted by Zorfox View Post
I basically agree with everything that's been said. The need for most hobbyists to follow a certain "method" seems to cause a lot confusion IMO. People seem to be focused on exacting calculations as well as squabbling over numbers, levels and... the big one, "does too much really cause algae".

There's nothing wrong with wanting exact numbers and questioning things. However, many hobbyists fail to learn the "why we dose what we dose" lesson. Once we understand that it gets really easy and it just makes sense.

The range for error is huge if you do regular water changes which happens to be the single most influencing factor for nutrient management. Something to remember,... that "fine line" where nutrients become limiting is finite. When you hit it, plants become limited. Above that line...nutrient Nirvana.

I see hobbyists trying to fine tune their dosing everyday. Nearly every one of them do at least monthly water changes. My question is, why would we ever want to approach that "line"? There's nothing to gain from dosing just above limitation. We can dose 5 times (probably much more) what we normally dose in most cases without issue. Big margin for error there. So all we need to do is stay well above that limiting point and we're all good right?

Think about it this way. Water changes and dosing alone can be used for nutrient calculations. Forget plant density, light levels, CO2 or any other factor. PROVIDED we do regular water changes. If water changes eliminate build up then why can't we dose out low tech tanks the same dose?

The answer is we can!

As I said I hate "method" names. However, if we look past the "how to" of the EI method we can see the beauty. Dosing non-limiting nutrients has been around for nearly a century folks. That's the most efficient fertilizing method and probably always will be.
Well then maybe to make it easy I'll go with the 40-60 gallon dosing guidelines. Not only to make it easy in the measuring spoon area, but to make sure my nutrients are absolutely NOT the limiting factor.
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post #10 of 10 (permalink) Old 04-20-2015, 03:38 AM
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Originally Posted by Little Soprano View Post
Well then maybe to make it easy I'll go with the 40-60 gallon dosing guidelines. Not only to make it easy in the measuring spoon area, but to make sure my nutrients are absolutely NOT the limiting factor.
That's the idea


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