Nutrient guide? - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 10-17-2012, 01:46 AM Thread Starter
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Nutrient guide?

Does anyone have a good link that will be a quick guide to what ferts you need to dose based off of what you see?

For example, https://www.plantedtank.net/forums/at...9&d=1166546074 , tells you what to do for certain algae issues. Do we have anything like this for nutrient deficiencies?

I never know what exactly I need to dose to help a plant get better.

Examples: Yellow leaves, holes in leaves, brown leaves, short stems, melting, etc.

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post #2 of 7 (permalink) Old 10-17-2012, 02:54 AM
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https://www.plantedtank.net/forums/sh...ad.php?t=98529

here is a diagram.

if you dose EI nutrient issues should rarely if ever arise.
Mg and Ca deficiency (can check a GH) are fairy rare (Ca deficiency really really rare per Tom Barr)

If you aren't dosing trace and iron -you likely will see Iron deficiency

If you have a high light tank and you have poor growth and are dosing NPK and trace and Iron its probably CO2.
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post #3 of 7 (permalink) Old 10-19-2012, 11:31 PM Thread Starter
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Thanks Sotty! That helped. Another good one I stumbled upon is https://www.plantedtank.net/forums/sh...d.php?t=113834

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post #4 of 7 (permalink) Old 10-20-2012, 03:18 AM
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Take all generalizations...well.........generally, with a grain of salt, they are mostly based on land plants, and have issues.

Someone who has grown many species for a decade or more can tell what is what and what the plant species should look like if they are healthy.

So the plants become the test kit. So look at nice healthy growth and pics of healthy tanks.

Try and do that.

Ferts are VERY EASY, light and CO2 are where the issues are at for 99% of the hobbyists IME. Light once set, it also very easy, leaving mostly CO2 related issues.




Regards,
Tom Barr
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post #5 of 7 (permalink) Old 10-20-2012, 05:23 AM
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^^^^
for emphasis.

Do yourself a favor and get on a systematic program like EI and you won't have nutrient deficiencies and then you just have to play with lights and CO2.

I originally thought i could dose my tank by what I saw, and it is just easier to remove the variable to good plant growth and give them what they need.
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post #6 of 7 (permalink) Old 10-30-2012, 01:35 AM Thread Starter
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If 99% of the problem is light and CO2, why do we fert? So when we see a deficiency, is it not nutrient deficiency?

I agree that it is most likely lack of CO2, but how do you tell the difference in CO2 deficiency and nutrient deficiency?

I did read in a plant book that carbon is needed in order for every nutrient to be used properly. So you might be seeing a nitrogen deficiency, but the real problem is that the plant does not have enough carbon to help it use the amount of nitrogen it needs. So, if you are using a good amount of CO2 with decent light and get deficiencies, its probably the nutrient you'll just need to dose with.

I could be wrong but this is how I see it at least for now. Would love to be able to completely understand the chemistry of it but it is very difficult to find statistical research on this topic.

Thanks guys. Thank you Mr. Barr. Your knowledge and experience keeps me sane.

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post #7 of 7 (permalink) Old 10-30-2012, 04:56 AM
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The main reason why nutrient deficiencies isn't a problem is that you can just dose per the EI method, and you will always have a surplus of all of the needed nutrients, so no deficiency will occur. That leaves CO2, which can be very difficult to get right, and light, which many people often over do.

If, for some reason, you don't use a dosing scheme similar to EI dosing, you may have nutrient deficiencies, but you choose to have them by not choosing a dosing method that eliminates them. If you enjoy chasing nutrient deficiencies, trying to dose exactly what the plants need, and no more, then you do need to figure out how to tell what deficiencies you have.

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