Potassium Sulfate or Potassium Chloride? - The Planted Tank Forum
 
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post #1 of 10 (permalink) Old 04-26-2007, 05:35 AM Thread Starter
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Potassium Sulfate or Potassium Chloride?

Which one would you prefer?

Both Potassium Sulfate (K2SO4) or Potassium Chloride (KCl) can be obtained from gardening stores. K2SO4 is often referred to as "Sulfate of Potash", and KCl is referred to as Muriate of Potash.

Which one is better as aqua fert.?
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post #2 of 10 (permalink) Old 04-26-2007, 05:39 AM
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I have always used K2SO4 which is what Rex steered me to. But I don't know that its better. It dissolves easily.





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post #3 of 10 (permalink) Old 04-26-2007, 05:39 AM
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If you dose KNO3 and KH2PO4 via EI, you should usually have enough K. I use K2SO4 to dose extra K when I need it though.

Last edited by epicfish; 04-26-2007 at 05:39 AM. Reason: ninja'd! :(
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post #4 of 10 (permalink) Old 04-26-2007, 05:40 AM
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I use k2so4 as well
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post #5 of 10 (permalink) Old 04-26-2007, 02:03 PM
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Quote:
Originally Posted by epicfish View Post
If you dose KNO3 and KH2PO4 via EI, you should usually have enough K. I use K2SO4 to dose extra K when I need it though.
Keep in mind tho that depending on your plant density and fish population you might not have to dose much KNO3 or KHPO4 at all since N and P are a by-product of decaying fish food and fish waste. If that is the case then your only source of K will be K2SO4 (since you dont want an OD of N or P) which is why I also have that on hand.

James

Last edited by Loyal to the Oil; 04-26-2007 at 07:38 PM.
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post #6 of 10 (permalink) Old 04-26-2007, 03:30 PM Thread Starter
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Sulfate of Potash from garden centers, are they good for aquarium? or getting K2SO4 from Greg Watson is safer?
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post #7 of 10 (permalink) Old 04-27-2007, 12:05 AM
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Its been mentioned in the past a few times that folks have gotten better growth with K2SO4 rather than KCl. It ws suggested that the trace amounts of chlorine could possibly be inhibiting growth slightly. But since many still use KCl I doubt it would be a major issue.
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post #8 of 10 (permalink) Old 04-27-2007, 12:55 AM
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Quote:
Originally Posted by Just40Fun View Post
Sulfate of Potash from garden centers, are they good for aquarium? or getting K2SO4 from Greg Watson is safer?
Greg no longer sells ferts. He sold the business.
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post #9 of 10 (permalink) Old 04-27-2007, 02:01 AM
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Originally Posted by Loyal to the Oil View Post
Keep in mind tho that depending on your plant density and fish population you might not have to dose much KNO3 or KHPO4 at all since N and P are a by-product of decaying fish food and fish waste. If that is the case then your only source of K will be K2SO4 (since you dont want an OD of N or P) which is why I also have that on hand.

James
I have a fully planted 40 gallon breeder with 24 tetras and ~9 WPG. I definately have to dose extra KNO3 and KH2PO4.
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post #10 of 10 (permalink) Old 04-27-2007, 03:40 AM
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As long as they are basic fert compounds from your gardening store I dont see why not. But I would'nt use chloride. Fertilizer compounds, they are easy to find.
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