Question on dosing

[CT]

I just started using LushGro-Aqua and LushGro-Mircos. I am adding 15ml of LushGro-Aqua and 1 ml of LushGro-Mircos weekly. According to the excel file provided by juggler, I am adding 22.255ppm of NO3 into my tank which is 3ft x 1.5ft x 1.5ft.

1) Do I have to add in PO4 to balance the NO3 added into the tank from LushGro-Aqua?

As if I dose as suggested, I will be dosing 22.25494ppm per week. so do I have to dose PO4 counter this increase in NO3

If I am dosing as suggested, I will be dosing

Nitrogen : 5.02530ppm/wk
NO3: 22.25494ppm/wk
K : 36.19770ppm/wk
S : 11.66690ppm/wk
Mg : 2.05940ppm/wk
Fe : 2.16991ppm/wk
Mn : 0.69365ppm/wk
B : 0.24234ppm/wk
Zn : 0.09319ppm/wk
Cu : 0.02996ppm/wk
Mo : 0.03318ppm/wk

2) According the thread http://www.aquaticquotient.com/phpbb...;&start=20
I have to dose the liquid fertilizer to add around 0.2 to 0.7ppm of iron, is this weekly amount or daily amount or amount to be maintain?

3) Also from the thread http://www.aquaticquotient.com/phpbb...ghlight=dosing, I have to maintain

NO3 : 5 to 10 ppm
PO4 : 0.5 to 1ppm
K : 5 to 10 ppm

So if I am dosing the LushGro-Aqua and LushGro-Mirco, I am already adding around 22 ppm of NO3 and 36 ppm of K per week. So according to the suggested starting dosing by vinz, I just need to add 1ppm of PO4 for a start as the NO3 and K is handle by the LushGro-Aqua and Mircos.

Specification of Tank
Size : 3ft x 1.5ft x1.5ft
Lighting : 4 x 36W PL 10 hrs/day
pH : 6.4 ~ 6.6
kH : 2
NO3 : 0 ppm (without dosing the liquid fertilizer measured using the Aquarium Pharmaceuticals NO3 test kit.)

[geoffrey]

Take a measurement first and find out if your PO4 is sufficient. If it is sufficient, you may want to hold. If you insist, do it slowly, a little at a time.

Some believe to maintain a healthy tank, NO3 to PO4 ratio should be around 20. Do a search on 'Redfield Ratio' to find out more.

[CT]

so maybe have to buy a PO4 test kit, anyone can suggest a good brand for it.

[juggler]

> Fe : 2.16991ppm/wk

Your Fe dosing is too high. Try to stick to 0.2 to 0.7 ppm as mention in part (2). I normally stick to the lower end of 0.2 ppm Fe per week.

Dr Mallick probably formulated the Lushgro-Aqua to take into consideration the ammonia (source of N) from fish food/waste. So you shouldn't be dosing using Lushgro-Aqua to get 22ppm NO3.

I would normally dose Aqua and Micros to get in total about 0.2ppm Fe per week. From there I separately dose K2SO4, KH2PO4 to supplement the K and P. You can use KNO3 to supplement the N if there's a shortage.

I have a similar tank like yours (210L), my dosing is:
Weekly: 4ml Aqua; ~1/2 tsp K2SO4 (~10ppm K); 1.5ppm PO4
Daily: 10 drops Rexolin (similar to Micros but lower in Fe) or you can try 5 drops Micros.
I feed the fish alot. So no need KNO3.

[CT]

hello juggler, according to your dosing, you are dosing around 1.4ppm of iron per week. so the 0.2~0.7ppm of iron is for per day?

[juggler]

[quote:8de48650="CT"]hello juggler, according to your dosing, you are dosing around 1.4ppm of iron per week. so the 0.2~0.7ppm of iron is for per day?[/quote:8de48650]

0.2~0.7ppm Fe is for weekly.
I just checked my Excel. I got a total of only 0.17ppm Fe per week.

[CT]

maybe I have downloaded the old version. may I know where can I download the latest version

[juggler]

[quote:f4fc34="CT"]maybe I have downloaded the old version. may I know where can I download the latest version[/quote:f4fc34]

You probably have downloaded the old copy after some member pointed out a mistake regarding the Fe content in this thread http://www.aquaticquotient.com/phpbb...ic.php?t=14658

The Excel sheet is still in the same place http://www.ntu.edu.sg/home/kfloh/dmdd.xls

[CT]

Hello juggler, the values to be enter in the yellow box are in drops right? After I enter 210L and 80 drops(4ml) for Aqua, the reading for Fe is 0.22ppm per week?

[CT]

ok juggler I think I know how you get your values. The dosing value that is be entered into the yellow box is the amount of dosing daily.

Thus the correct value of nutrients I am adding to my tank with the present dosing is ;-

N = 0.7179 ppm
NO3 = 3.17928 ppm
K = 5.17110 ppm
S = 1.66670 ppm
Mg = 0.29420 ppm
Fe = 0.30999 ppm
Mn = 0.09909 ppm
B = 0.03462 ppm
Zn = 0.01331ppm
Cu = 0.00428 ppm
Mo = 0.00474 ppm

So I have to add NO3 as the NO3 level add per week by the Aqua is only 3.17928ppm?

[chua]

Hi Juggler,

Is it possible that you can do an excel for TMG as well.

The contents of TMG are given in % and not ppm.

Or is there any way to convert from % to ppm.

Thks.

[geoffrey]

Let me show you how to do it. K in TMG is 0.79% right.

When it is expressed in percentage, simply multiply it with 1000g/L. Hence,
0.79% x 1000 = 7.9g/L or 7.9mg/ml.
10ml of it will give 79mg and that into 10L of water give 7.9ppm.

[juggler]

[quote:01c7a4b0d0="CT"]ok juggler I think I know how you get your values. The dosing value that is be entered into the yellow box is the amount of dosing daily.

Thus the correct value of nutrients I am adding to my tank with the present dosing is ;-

N = 0.7179 ppm
NO3 = 3.17928 ppm
K = 5.17110 ppm
S = 1.66670 ppm
Mg = 0.29420 ppm
Fe = 0.30999 ppm
Mn = 0.09909 ppm
B = 0.03462 ppm
Zn = 0.01331ppm
Cu = 0.00428 ppm
Mo = 0.00474 ppm

So I have to add NO3 as the NO3 level add per week by the Aqua is only 3.17928ppm?[/quote:01c7a4b0d0]

Thanks for the feedback. I will update my Excel sheet to let others know that the entries are for daily dosings.

BTW - for NO3, depends on your fish load and your fish feeding habits. If you feed them a lot, you need not dose NO3. Otherwise, you will need. One symptom of N deficiency is yellowing of old leaves.

[CT]

I have just read about the estimative index method by Thomas Barr. He mention about knowing the NO3, PO4, K and Fe level of the tap water. As the figure given by PUB is in mg/l, so was wondering how to we convert is into ppm?

Does he meant that we just have to calculated the value of NO3, PO4, K and Fe level that is to be added from the water tap during water change and substract it with the ideal range of those nutrients.

The result from the above calculation will be the rough range that you have to topup after the water change. The no. of times you dose the mix will depend on the lighting level, plants,...etc of the tank?

[juggler]

1 mg/l = 1 ppm

The nutrient figures given by PUB is in a range (eg. NO3) or pretty low (eg. PO4, Fe) or none (eg. K). I am not sure how the rest do it but I just dose as if it weren't there.

[CT]

[quote:04d88ec481="geoffrey"]Let me show you how to do it. K in TMG is 0.79% right.

When it is expressed in percentage, simply multiply it with 1000g/L. Hence,
0.79% x 1000 = 7.9g/L or 7.9mg/ml.
10ml of it will give 79mg and that into 10L of water give 7.9ppm.[/quote:04d88ec481]

hello geoffrey, does 0.79% mean that 0.79g/100g of water?

[chua]

Let me show you how to do it. K in TMG is 0.79% right.

When it is expressed in percentage, simply multiply it with 1000g/L. Hence,
0.79% x 1000 = 7.9g/L or 7.9mg/ml.
10ml of it will give 79mg and that into 10L of water give 7.9ppm.

If i follow the above caculation,

Since i am adding 4ml of TGM daily,
This give me 4ml*7days*7.9 = 221.2mg of k per week

AS my tank is a 3ft tank of around 160l,
This give me only 221.2/160 = 1.3825ppm of k per week

I believe that i have adding alot of TGM as compare to the recommended dosage but the calculated k is only so little?

Is there anything wrong with the conversion.

Can geoffery or anyone check my calculation
or is the conversion not correct.

Thks.

[geoffrey]

CT,

No, 0.79% means 0.79% of 1000g/L. Regardless if it is 10% or 2.5%, it's still a percentage of 1000g/L.

Chua,

Your calculation is correct. That is why some people supplement K2SO4 with their TMG dose. Even EasyLife Pro-fito which claims itself as a very concentrated fertiliser provides only 0.7ppm into a 100L tank from it's recommended dose.

[chua]

If that is the case, according to the thread that i had post
http://www.aquaticquotient.com/phpBB...ic.php?t=18170

I am recommended not to dose any k.
The reasons stated are that both KNO3 and TMG contain it and will be sufficient.

But the part play by TMG is really insignificant (used to believe that it will provide a substantial amount) and that provided by KNO3 will not be sufficient to reach the 10-20ppm of k.

I am starting to get a little bit confuse.
[/quote]

[geoffrey]

Chua,

If i follow the above caculation,

Since i am adding 4ml of TGM daily,
This give me 4ml*7days*7.9 = 221.2mg of k per week

AS my tank is a 3ft tank of around 160l,
This give me only 221.2/160 = 1.3825ppm of k per week

I believe that i have adding alot of TGM as compare to the recommended dosage but the calculated k is only so little?

Is there anything wrong with the conversion.

Can geoffery or anyone check my calculation
or is the conversion not correct.

Thks.

When I responded to your above query, I only took into account your K from TMG and indicated to you that K from it is insufficient and you may need to supplement with K2SO4. I did not consider or refer to your other post and I did not account for the K from your KNO3 dose when I made this response. However, if you had indicated here earlier that you are also dosing 5ppm 3x weekly of KNO3, then I would have told you that K is sufficiently supplied, similiarly to what I have responded in here.