im dosing correctly ?

[sawzai]

using lushgro aqua ( macro )

currently dosing 42ml in my 420L tank 2x a week.
according to the dmdd excel document , input 420 L and 42 ml shows nitrate daily 3.02ppm , weekly 21.195ppm. does that mean if i dose 42ml one time , it will add 3.02 ppm of nitrate ???

[sawzai]

anyone ?

[Alvin Koh]

Sawzai, that's the way I interpret it too.
The dosage displayed is meant to correspond to "daily ppm".

[sawzai]

Thanks (: wondered why the label said 10ml / 100litre once a week. Nowonder my tank was full of bga last time

[stressed]

Don't understand why u said the way u dosed ended up w bga

[sawzai]

Don't understand why u said the way u dosed ended up w bga

that is because i does 10ml / 100 litre once a week instead of dosing 40ml of it every 2-3 days

[stressed]

I see , too much in the beginning and insufficient at the end of the week. You may also want to consider portioning out the fert regime into smaller portions but doing it daily.

[sawzai]

okay
by the way , we are supposed to keep the weekly range no3 10-30ppm , po4 1-2 ppm , fe 0.2-0.5, k+ 10-30ppm

does it mean that every time we dose, we have to dose that amount ? or is it those amount DIVIDE by the number of time you dose ?

[Alvin Koh]

sawzai,

You are supposed to divide the dose so that the total amount dosed adds up to your target ppm.

[sawzai]

sawzai,

You are supposed to divide the dose so that the total amount dosed adds up to your target ppm.

I see. so example weekly range for NO3 is 30ppm. 1 week I dose 3 times. So 30 divide 3 , each dose i should provide 10ppm of nitrate ?
and this applies the same to PO4 and FE ?

[Alvin Koh]

I see. so example weekly range for NO3 is 30ppm. 1 week I dose 3 times. So 30 divide 3 , each dose i should provide 10ppm of nitrate ?
and this applies the same to PO4 and FE ?

Yes. That's right.

[sawzai]

Yes. That's right.

thanks !

[cheeboonyong]

Mine is also a 4 footer. I dose around 60ml Lushgro macro once per week. Sometimes I add more, sometimes less.

It all depends on your lighting and amount & type of plants. I never measure my nitrate levels using a test kit. Inaccurate and unreliable anyway. Just monitor your plants. If they are growing well, then whatever you're doing is fine. If you get BGA, then nitrates are too low. That's the top and bottom range. Experiment for yourself.

The plants don't start absorbing nutrients only when you hit a magic ppm number.

Remember to add phosphate. I believe Lushgro doesn't have phosphate.

[BlessChwee]

dosing 40ml a week seems to be very costly in the long run, how abt u dry fertilizers instead

[David]

correct me if I am wrong but BGA (Blue Green Algae) is not a true algae but a cyanobacteria. Overdosing of fert does get you every other algae but not BGA. You need a combination of the following:

1. Bright Lighting.

2. High waste and/or rotting material at substrate level that is not siphoned out.

3. Unmaintained Filter.

[li_gangyi]

Underdosing of nitrates has been known to be a precursor to BGA formation. Together with low oxygen levels.

[furyprix]

hi guys, from the website 'http://www.ecocityhydroponics.com/lushgro-aqua-liquid.html' , it says that lushgro aqua has phosphorous and not potassium. care to clarify?

i'm thinking of getting new ferts, so im considering lushgro aqua and some dry fert, but couldnt conclude which one to get, K or P.