Adding dry ferts

[bhavik95]

Hi there I have a 100g of potassium dry fert and I just wanted to know how much water would I need to dissolve it in and how much would I need to dose daily or weekly for a 200 litre tank?

At the moment I am using api leaf zone and was wondering if I overdose compared to the normal dosage would that help the plants and would it affect my fishes?

Thanks

 

[Delapool]

I can't help on the first part but I dry dose nightly with a teaspoon and dose very high at EI levels or above. Never noticed any issues from fish and as I understand it, potassium is one that fish don't have much trouble with.

Found a dosing calculator

http://rotalabutterfly.com

 

[bhavik95]

Thanks for that i am assuming you have a very high light setup in your tank and thats why your dosing a teaspoon a day?

but for me i think mine is a low light setup as i have 60w for 200l and not add co2 yet
so would i be better of adding a teaspoon 1-2 a week?

i had a look at the dosing calculator but just unsure which one would be best for me

thanks

 

[Delapool]

Yes, sorry - high light, injected CO2 and fast growing stem plants here. If you are getting pinprick holes on lower leaves I'd increase k dosing else it looks like light dosing will add about 1ppm per day.

http://www.theplantedtank.co.uk/PMDD.htm

https://sites.google.com/site/aquaticplantfertilizer/home/pps-pro

 

[bhavik95]

Ok that's for that! How much in grams would 1ppm be?
And will it still work if I dose for the whole week together in one?

 

[Delapool]

Ok that's for that! How much in grams would 1ppm be?
And will it still work if I dose for the whole week together in one?

Dosing all at once is not ideal although for potassium should be ok for fish. I dose dry ferts straight in tank - 1 teaspoon is about 5 grams. The calculators will tell you how much will be actual potassium. I'd say if you can dose 3 or 2 times a week that will spread it over the week a bit better and plants are getting a steady dose.