Potassium Nitrate Question - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 06-15-2014, 04:15 AM Thread Starter
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Potassium Nitrate Question

I dose KNO3 (potassium Nitrate) and also dose K2So4 (Potassium Sulphate) in a high light Co2 650lt tank Water change about 50% every week.

Question is: does the potassium in the KNO3 mean that I don't need to be adding the K2So4 to gain enough K in the tank? I dose using the EI 2 times per week + some root tabs (seachem) and have a med bio load from the fish.

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post #2 of 6 (permalink) Old 06-15-2014, 05:15 AM
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I dose KN03 and K2So4 in my tank. I don't seem to need as much nitrate so I add the K2So4 to make sure my potassium is still okay, you can't OD it anyway.
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post #3 of 6 (permalink) Old 06-15-2014, 08:11 AM Thread Starter
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OK thanks. Ill just stick with what ive been doing then

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post #4 of 6 (permalink) Old 06-15-2014, 02:30 PM
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A a full EI dose of KNO3 provide 63% of the potassium recommended. That's usually sufficient. You can always adjust the K2SO4 dose to account for the missing 37%. However, dosing additional potassium won't hurt anything.
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post #5 of 6 (permalink) Old 06-15-2014, 02:56 PM
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When I had a lot of livestock in my tanks I dosed very little KNO3.
I used K2SO4 as the K source.

As noted above, if you are dosing the full recommended amount of KNO3 per EI methods, then that should be enough K. If not, add a little K2SO4.

The amount of K from KH2PO4 is so low it pretty much does not count.
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post #6 of 6 (permalink) Old 06-16-2014, 05:47 AM Thread Starter
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Quote:
Originally Posted by Zorfox View Post
A a full EI dose of KNO3 provide 63% of the potassium recommended. That's usually sufficient. You can always adjust the K2SO4 dose to account for the missing 37%. However, dosing additional potassium won't hurt anything.
Thanks, it makes good sense now. I have only started with proper EI as previously i did not have CO2.

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