mixing NPK and Mg in one bottle - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 03-07-2008, 01:39 AM Thread Starter
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mixing NPK and Mg in one bottle

Hi all,

Is it ok to mix KNO3 + KH2PO4 + K2SO4 + MgSO4*7H2O all into ONE stock solution (all in one bottle)

Of course, I will figure out all the right ratios that go into the bottle.

Is there any bad chemical reaction that might cause problem? anything that might effect its potency?

Thanks.

Kevin
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post #2 of 10 (permalink) Old 03-07-2008, 02:33 AM
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No this is commonly done with PPS dosing, which is currently what I am doing. Search for PPS-Pro calculator to find the right mixture for the bottle size.

Tom
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post #3 of 10 (permalink) Old 03-07-2008, 02:50 AM Thread Starter
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Thanks Tom,

That's exactly what I am doing. PPS-Pro and working my way to autodosing.

Many people mix NPK in one solution, but I choose to mix NPK and Mg, the Mg part is what I'm not so sure.

I'm using an empty 750 ml liquor bottle and a measured 1/4 oz pour spout for now. each pour would add NPK and Mg.

Since you pointed out PPS mixing, I realize that I misunderstood the PPS-Pro instruction, the instruction says:

In 1 liter bottle:
59 grams K2SO4 (Potassium Sulfate)
65 grams KNO3 (Potassium Nitrate)
6 grams KH2PO4 (Mono Potassium Phosphate)
41 grams MgSO4 (Magnesium Sulfate)

I thought 1 liter of each solution, now it's obvious that 1 liter hold all of these compounds!

Thanks again.

Kevin
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post #4 of 10 (permalink) Old 03-07-2008, 05:24 AM
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I don't know if you found it but here is the calc for PPS pro http://ca.geocities.com/[email protected]
just add the ml of the bottle size and it will give you the grams per mac and mic. Good luck

Tom


PER 750ML
KNSO4 44g
KNO3 49g
KH2PO4 4g
MGSO4 30g


TRACE 60g

if you are using a dif size bottle for the trace/micros then then (60) will have to be changed.
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post #5 of 10 (permalink) Old 03-07-2008, 06:44 AM Thread Starter
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Thanks again Tom.

I didn't use the calculator, I think I got it figured out. Below is my calculation. I wish I found the calculator earlier

My tank hold 30 gallon of water, but I don't dose 3 ml, instead I dose 7.4 ml which is 1/4 oz. I choose 1/4 oz because I use measured pour spout that dispense 1/4 liquid oz per dose. (the one that bartender use for exact measuring)

750 ml bottle = 101.4 doses (1/4 oz per dose)

Macro solution. 1ml per 10 gallon
In 1 liter bottle:
59 grams K2SO4 (Potassium Sulfate)
65 grams KNO3 (Potassium Nitrate)
6 grams KH2PO4 (Mono Potassium Phosphate)
41 grams MgSO4 (Magnesium Sulfate)

if my tank hold 10 gallon then this solution should contain 1000 doses, but since I have 30 gallons so it's 333.33 doses in this 1 liter bottle.

59 grams of K2SO4 = 333.33 doses into 30 gallon of water.
therefore 17.95 grams of K2S04 = 101.4 doses. (101.4 dose is my bottle)

65 grams of KNO3 = 333.33 doses into 30 gallon of water.
therefore 19.77 grams of KNO3 = 101.4 doses.

6 grams of KH2PO4 = 333.33 doses into 30 gallon of water.
therefore 1.83 grams of KH2PO4 = 101.4 doses.

41 grams of MgSO4 = 333.33 doses into 30 gallon of water.
therefore 12.47 grams of MgSO4 = 101.4 doses.

add each of these into 750 ml bottle and fill it up with RO water, shake it well and serve 1/4 oz per day.

I hope there is no error in my calculation.

Thanks again for your help.

Kevin
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post #6 of 10 (permalink) Old 03-07-2008, 01:47 PM
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hey i use this :
150 gr KNO3
50 gr KH2PO4
50 gr K2SO4
add these to 1 liter of H20

then i dose 5 ml to a 20 gallon tank.

what do you think?


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post #7 of 10 (permalink) Old 03-07-2008, 04:46 PM
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Kevin I am no expert in dosing as I just started using PPS myself. I'd just check your levels at the end of the day or at the end of the week. The point of PPS would be to have just enough nutrients for the plants per day, this way you don't have to worry about 50% water changes each week to rid your self of that extra nutrients that is building up.

IKUZO- are you joking?

Goodluck hope i helped in some way.
Tom
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post #8 of 10 (permalink) Old 03-07-2008, 05:44 PM Thread Starter
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Tom,

Thank you. I'm new to this too, if PPS-Pro works I don't why people would do EI.

I don't think Ikuzo is joking, look like he's dosing EI.

Kevin
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post #9 of 10 (permalink) Old 03-07-2008, 06:15 PM
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Too me PPS was the smart and easy way to go, mix a bottle in the beggining and dose according to your tank size, no left overs that you have to remove at the end of the week.

IZUKO- sorry if you arent joking, your amount seems very high to dose that much per day (if you are dosing per day) what system are you using PPS, EI? If it is EI I really can't help you. Sorry. If it is PPS then I'd use the link to the PPS calculator and check your amounts to the bottle size.

Tom (not an expert)
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post #10 of 10 (permalink) Old 03-08-2008, 12:21 AM
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it's ok

i think it's around the same as i use chuck's calculator as a guide.

with this mix i get approximately 5 ppm of NO3, 2 ppm of PO4, and about 6 ppm of K.


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