dosing liquid fertilizer

[plant talk]

Hi guy,

I got a bot of iron & trace element(liquild form), potassium sulfate
(crystral form) n magnesium sulfate(crystral form).

I do not know how to measure in ppm so the follow the instruction from the bot of K2SO4 n SO4*7H2O which say half teaspoon per 100L and 1 quarter per 200L of water in weekly basis.

After 2 week most the plant leave start melting away.

I went to the site where there is instruction of how to dose liquid fert but I dun understand wat is ppm.

Pls kindly advise.Thanx!

[Sleepy_lancs]

Chuck's Calculator

Click the above link and use that to help you. Any problem post again for help

[plant talk]

Hi,

I already install the calculator.

I dun understand the what is the meaning of ppm.Pls explain what is ppm and how do I calculate it.

[Sleepy_lancs]

PPM = Parts per Million. Erm.. what do you mean how to calculate. What you get there defines how much 1ml is worth.

[foocp]

[quote:0e4a43379c="plant talk"]
After 2 week most the plant leave start melting away.
[/quote:0e4a43379c]

Is your tank newly setup? What kind of plants do you have in your tank?
It will be helpful if you are able to provide more info on your tank parameters, like pH, etc

[juggler]

Yes. More tank info is needed. You can use the questionnaire "Newbie planted tank help"at the top of the forum for "Planted tanks: general".

Plants take up nutrients in small amounts we measured in "ppm". We dose fertilisers into the tank to maintain a reservoir of such nutrients to sustain their growth.

Firstly, you need to get some test kits to measure the tank water. Such kits include tests for NO3, PO4, kH, pH, Fe, gH etc.

Then you measure your tank water. Based on your results, then you top up the lacking nutrient and not to dose if some nutrient is already in excess. Suggested values can be found at this article http://www.sfbaaps.com/reference/barr_02_01.shtml

[plant talk]

Hi guy,

PPM = Parts per Million. What you get there defines how much 1ml is worth.

I still don't understand 'what you get parts per million define how much 1ml is worth...wow very chim..

My tank is:
150x60x60cm(setup:2.7year)
PH: 6.8-7
KH :3(unable to increase to 4 using baking powder)
Temp: 28
Lighting: 55x4watts n 36x4watts
base fert: 6 pack of JBL ( 4mth old )
Liquid fert Iron&Trace element,Potassium sulfate and Magnesium sulfate
(dunno how to use)
Plant: hair grass, red lotus, taiwan moss,ect..( the rest I have to check their name)

Pls kindly teach me how to dose liquid fert. I still confused when ppl here mention example dosing 5 ppm or 10ppm.

[tawauboy]

[quote:350c0351c1="plant talk"]Hi guy,

PPM = Parts per Million. What you get there defines how much 1ml is worth.

[/quote:350c0351c1]

ppm is just concentration.

for example,
in a 20l tank, dose 1ml of ‘super duper fertiliser’ gives 10ppm of nutrients x,y,z.
so for a 100l tank, you’ll need to dose 5ml to achieve the same 10ppm of nutrients.

[plant talk]

Hi,

If Im dosing crystral form potassium sulfate.How much do I add in to get the correct ppm for plant to get sufficient nutrient?

example: 150x60x60cm tank,how much ppm of potassium sulfate and magnesium sulfate is enough??

I have tried to add 1 teaspoon of potassium sulfate and 1/2 teaspoon of magnesium sulfate in a weekly basis, the leave of the plant start melting away.Why the result like this?

What are all the main liquid fertilizer that a plant need?

[juggler]

[quote:70bc32d895="plant talk"]Hi,

If Im dosing crystral form potassium sulfate.How much do I add in to get the correct ppm for plant to get sufficient nutrient?

example: 150x60x60cm tank,how much ppm of potassium sulfate and magnesium sulfate is enough??

I have tried to add 1 teaspoon of potassium sulfate and 1/2 teaspoon of magnesium sulfate in a weekly basis, the leave of the plant start melting away.Why the result like this?

What are all the main liquid fertilizer that a plant need?[/quote:70bc32d895]

From Chuck's calculator, you can aim for 10ppm K per week. So that would mean, for your tank size of 540L, putting in 2 teaspoon of K2SO4 weekly after water change.
For MgSO4, I would avoid dosing since our tap water has it already. Dosing extra may cause more harm than good.

What about your NO3 and PO4 levels? Have you measured them already?
In my tanks, I aim to get around 10ppm NO3 and 1.0ppm PO4. If these are low, I will top up with doses of KNO3 and KH2PO4 respectively. You can use Chuck's calculator to compute.

That settles the macronutrients.

You should read up more on the links at the FAQ http://www.aquaticquotient.com/phpbb...ic.php?t=12122

Happy dosing.

[plant talk]

Hi Juggler,

You mention that MgSO4 already exist in tapwater, but I still dose Mg SO4. So could it be the reason that my plant's leaves melt away?

BTW,where can I buy NO3 and PO4 and generally how much it cost?

Thanks to Juggler n all the ppl advise.

[tawauboy]

don't think overdose of mg will cause leaves to melt. however, ime, plants growth will slow down drastically.

you can get no3 (from kno3) and po4 (from kh2po4) from dr mallick or seachem nitrogen/phoporous. check dr mallick's address from lfs list.

[PeterGwee]

No, highly unlikely for the plants to melt away with addition of MgSO4 unless you are referring to crypts. I remember I did ask you to crank up your CO2 level? Your current CO2 level is too low for the amount of light over your tank. Drop the pH down to 6.4-6.5 using CO2 only and keep it there for the entire photoperiod. Prune away dead looking leaves and do a large water change after that. Dose nutrients regularly to prevent things from running out and keep a close watch on the pH/KH (CO2 level).

You can get KNO3 (Potassium nitrate) and KH2PO4 (Potassium dihydrogen phosphate) from Dr Mallick's retail outlets. The locations are listed in the LFS list on the top right section of the screen/page.

Regards
Peter Gwee

[juggler]

[quote:e5f6240990="plant talk"]Hi Juggler,

You mention that MgSO4 already exist in tapwater, but I still dose Mg SO4. So could it be the reason that my plant's leaves melt away?

BTW,where can I buy NO3 and PO4 and generally how much it cost?

Thanks to Juggler n all the ppl advise. [/quote:e5f6240990]

Before you go out to get the chemicals, you should be checking if you have enough NO3, PO4 in your tank. We are not sure what you are keeping. Probably you have been feeding beefheart to your discus and NO3 levels will definitely be high and so no need to dose at all.

If you want to take things one step at a time, then just stop the MgSO4 dosing. Continue the 10ppm K per week after your water change. Don't stinge on feeding your fish. Feeding helps to supply NO3 and PO4 as well. Dose the trace elements as recommended. See if things improve over the next few weeks.

Dr Mallick has a website with all his products and prices. See http://www.singaporehydroponics.com/

Lastly, up the CO2 as Peter recommended.

[loupgarou]

perhaps also helpful

1 ppm= 1mg/l

[plant talk]

Hi,

I tried to increase the co2 but still the PH did not drop.I do not have coral chip inside the filter.I even remove a wood block that have attached crystal on it.

The only time that the PH drop is when I remove all the fish in my tank.The PH drop to 6.6 n for 3 week the tank surface had no green algae on it.That is the only time I feel very happy.However, I was told by somebody that fish load do not effect the PH so I let things stay the same.