Potassium nitrate....should I? - The Planted Tank Forum
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post #1 of 10 (permalink) Old 09-11-2016, 08:44 PM Thread Starter
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Potassium nitrate....should I?

hi all! my friend told me i should start to dose Kno3 twice a week as a fertilizer to supply potassium to my plants. I already dose trace elements twice a week and MGS04 once a week. However im afraid that my nitrates would increase (they are already around 25ppm). Should I dose it? Im a newbie to planted aquariums and im at a loss with all the conflicting info.

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post #2 of 10 (permalink) Old 09-11-2016, 08:57 PM
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No, do not dose more KNO3. 25 ppm NO3 is perfect. Go to the grocery store and get Potassium Chloride salt substitute. Or order some Potassium Sulfate online.
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post #3 of 10 (permalink) Old 09-11-2016, 09:41 PM
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How often are you doing water changes.

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post #4 of 10 (permalink) Old 09-11-2016, 09:50 PM
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Quote:
Originally Posted by seanbugeja View Post
hi all! my friend told me i should start to dose Kno3 twice a week as a fertilizer to supply potassium to my plants.
KNO3 is for dosing nitrates. Target of KNO3 is 10-20. Potassium supplied using potassium sulfate (K2SO4) or potassium chloride (No-Salt). Target of potassium is 20 ppm.

Could you post a front full view pic of the tank?
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post #5 of 10 (permalink) Old 09-12-2016, 02:23 AM
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Replace KNO3 with KSO4, and use half the amount of recommended KNO3 to get the equivalent K ratio. This what I am going to do on my next mix.
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post #6 of 10 (permalink) Old 09-12-2016, 02:55 AM
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i would not recommend Potassium chloride: it has killed one of my tough fish in a few hours. Go with Potassium sulfate.
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post #7 of 10 (permalink) Old 09-12-2016, 03:21 AM Thread Starter
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Thanks everyone. How often should I dose potassium sulfate?
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post #8 of 10 (permalink) Old 09-12-2016, 03:30 AM Thread Starter
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I was going to dose 7gramms weekly in a 200 litres aquarium. Target waterchanges is once every 2 weeks.
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post #9 of 10 (permalink) Old 09-12-2016, 04:27 AM
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People will tell you to try for 50% weekly. Unless you want to jump through hoops to save yourself a little on water changes, shoot for 30-50% weekly.
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post #10 of 10 (permalink) Old 09-12-2016, 06:38 AM Thread Starter
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Would a dose of 3.66 ppm twice a week be enough. (keep in mind I'll be doing waterchanges once every 2 weeks)
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