Dosing Greg's ferts - The Planted Tank Forum
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post #1 of 23 (permalink) Old 03-15-2007, 03:02 PM Thread Starter
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Dosing Greg's ferts

ok gonna give it a try and i read the sticky about dosing. Now are these the only ferts that i will need according to the sticky.

Tank's (2)
40~60gal
50%H20 change-weekly
+/-1/2Tsp KN03 3x a week
+/-1/8Tsp KH2P04 3x a week
+/-1/8Tsp K2S04 3x a week
+/-10ml Trace 3x a week
+/-2-4ml Fe/Iron 3x a week

Tank is a 55g that is med planted and wanting to become heavily platned with injected co2 and 2wpg lighting. thanks for any advice starting out with dry fert dosing.

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post #2 of 23 (permalink) Old 03-15-2007, 03:27 PM
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Should be.....

KN03
KH2P04
K2s04
Csm+b

but the K2S04 is optional since you are dosing K with the N and the P

FUNction over form

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post #3 of 23 (permalink) Old 03-15-2007, 11:15 PM
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Quote:
Originally Posted by eklikewhoa View Post
Should be.....

KN03
KH2P04
K2s04
Csm+b

but the K2S04 is optional since you are dosing K with the N and the P
Some say it is optional, but I would not completely over look it, the 'S' is also a much needed nutrient that is rarely recognized, and needed by the plants in at least mIcro form, if one is only using CSM+B as a trace element, then adding K2S04 is an additional plus. CSM+B has zero 'S', where as Flourish and Tropica does contain some.
I personally have seen positive results from dosing K2S04 at least once a week.
Each individual must work out their own salvation for the tank they maintain.

It is cheap, easy to dose and certainly does not hurt.

KN03
KH2P04
K2S04
CSM+B

Somewhere along the way in your planted tank en devours I would also purchase Flourish Comprehensive and some Tropica plant nutrition to dose as trace minerals on occasion.

I use CSM+B most of the time, but I do also use the other trace elements available at various times, usually once a week, one or the other, then use CSM+B for the rest of the week.

With only 2WPG you would not need to dose all that 3x a week, that would be a bit to much, unless you increase your light.
This is where the +/- comes in.

+/-1/4Tsp KN03 3x a week
+/-1/16Tsp KH2P04 3x a week
+/-1/16Tsp K2S04 3x a week
+/-7ml Trace 3x a week
+/-1-2ml Fe/Iron 3x a week- again, with only 2WPG you can get by without this, there is enough in the trace mineral, unless you pump up the light.

or

+/-1/2Tsp KN03 2x a week
+/-1/8Tsp KH2P04 2x a week
+/-1/8Tsp K2S04 2x a week
+/-10ml Trace 2x a week
+/-2-4ml Fe/Iron 2x a week

Craig

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post #4 of 23 (permalink) Old 03-16-2007, 02:06 AM
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does anyone use npk? If you do what else do you need to use?
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post #5 of 23 (permalink) Old 03-16-2007, 01:08 PM
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Originally Posted by fishymatty View Post
does anyone use npk? If you do what else do you need to use?
??????

OK, unless there is a brand I don't know about, NPK stands for Nitrogen, Phosphate and Potassium (respectively), which is found in KNO3, KH2P04, K2S04 (respectively). Those are the Macro Nutrients, after that you also need Carbon (CO2, or Flourish Excel), and MicroNutrients (CSM+B, Tropica plant nutrition) .

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post #6 of 23 (permalink) Old 03-16-2007, 01:28 PM Thread Starter
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Ok i want to use the cheap auto dosing would i mix all the ferts together in a bottle of water for like 2 weeks worth or how do you all do it?

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post #7 of 23 (permalink) Old 03-16-2007, 11:52 PM
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Quote:
Originally Posted by tazcrash69 View Post
??????

OK, unless there is a brand I don't know about, NPK stands for Nitrogen, Phosphate and Potassium (respectively), which is found in KNO3, KH2P04, K2S04 (respectively). Those are the Macro Nutrients, after that you also need Carbon (CO2, or Flourish Excel), and MicroNutrients (CSM+B, Tropica plant nutrition) .
He's probably talking about the Seachem Nitrogen, Phosphorous, and Potassium macros.

If you use NPK you would also need trace and iron, though trace alone might have enough iron in it.
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post #8 of 23 (permalink) Old 03-17-2007, 12:09 AM
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Quote:
Originally Posted by kunerd View Post
Ok i want to use the cheap auto dosing would i mix all the ferts together in a bottle of water for like 2 weeks worth or how do you all do it?
This has been discussed before, but you can mix the macros together but don't combine the micros with that solution. Something about phosphate precipitating iron chelates and some such. Just keep phosphate and iron separate. Would be best to use some distilled water for the dilution as your tap might contain phosphates also ...
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post #9 of 23 (permalink) Old 03-19-2007, 03:45 PM
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Hi all,

Where can I buy all this stuff in the UK???

Thanks
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post #10 of 23 (permalink) Old 03-19-2007, 09:55 PM
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Hi

Aqua Essentials carries them in the UK: http://www.aquaessentials.co.uk/inde...&cPath=145_146

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post #11 of 23 (permalink) Old 03-20-2007, 10:47 AM
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Quote:
Originally Posted by Left C View Post
Hi

Aqua Essentials carries them in the UK: http://www.aquaessentials.co.uk/inde...&cPath=145_146
Many thanks, for a 30G how long would 250 grams of each would last for?
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post #12 of 23 (permalink) Old 03-20-2007, 01:40 PM
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Originally Posted by LondonDragon View Post
Hi all,

Where can I buy all this stuff in the UK???

Thanks
Any place that sells hydroponic supplies should have them. I list three places in my Guide that have sold the bulk dry nutrients in the past. In the Fertilizer section, bottom of the page.
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post #13 of 23 (permalink) Old 03-20-2007, 09:42 PM
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Many thanks, for a 30G how long would 250 grams of each would last for?
Many people buy it by the pound or 454 grams. It's lasts a long time. 250 grams will last a long time as well. I did some ball park calculations below to get an idea about how long 250 grams will last. But, please double check my math. It should be close though.

I used chuck's calculator to get the weights of the dry ferts: http://www.csd.net/~cgadd/aqua/art_p...osage_calc.htm

You have a 30g tank. I used Tom Barr's EI dosing for a 20g to 40g tank from this article: http://www.barrreport.com/articles/1...ive-index.html

20-40 Gallon Aquariums

+/- 1/4 tsp (1.4 gm) KN03 3x a week = 4.2 gm per week, then 250 gm /4.2 gm per week = ~ 60 weeks or ~ 1.2 years

+/- 1/16 tsp (0.3 gm) KH2P04 3x a week = 0.9 gm per week, then 250 gm /0.9 gm per week = ~ 278 weeks or ~ 5.3 years

+/- 1/16 tsp K2S04 (0.38 gm) 3x a week = 1.14 gm per week, then 250 gm /1.14 gm per week = ~ 219 weeks or ~ 4.2 years

+/- 1/16 tsp (5ml) Trace Elements 3x a week {I didn't figure the trace}

50% weekly water change

You can see that 250 grams of the ferts can last from ~ 1 year to ~ 5 years but that still depends on what you actually use. This is just one example of a dosing schedule.

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post #14 of 23 (permalink) Old 03-20-2007, 10:59 PM
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Many thanks guys seems like the way to go, I have been buying Kent Botanica products but they seem expensive to me and this way is more economical.

Sorry for being a pain, but I am new to this powder fertilization, could you please explain from the aquaessentials web site ( http://www.aquaessentials.co.uk/inde...&cPath=145_146 ) what is what, with matching the codes KN03 etc... to the right products.

Also I just purchased a new light unit with 4x24w T5 is this enough or should I also use my existing 2x24w T5 aswell?

Many thanks for all the help
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post #15 of 23 (permalink) Old 03-20-2007, 11:15 PM
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Originally Posted by LondonDragon View Post
Many thanks guys seems like the way to go, I have been buying Kent Botanica products but they seem expensive to me and this way is more economical.

Sorry for being a pain, but I am new to this powder fertilization, could you please explain from the aquaessentials web site ( http://www.aquaessentials.co.uk/inde...&cPath=145_146 ) what is what, with matching the codes KN03 etc... to the right products.

Many thanks for all the help
You're welcome!

Is this what you are asking:
Potassium Nitrate KNO3
Mono Potassium Phosphate KH2PO4
Potassium Sulfate K2SO4

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