Questions on Dosing K2SO4 - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 01-06-2005, 03:29 AM Thread Starter
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Questions on Dosing K2SO4

I dose dry in my 20 gal. 1/2 a tsp. once per wk. @ waterchanges..

12 gal. 1/4 tsp. once per wk. @ waterchanges.

Does this sound about right for a High lit Planted Tank??

STill learning on this....
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post #2 of 7 (permalink) Old 01-06-2005, 03:37 AM
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How much KN03 and KH2P04 do you dose? both these have Potassium also.

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post #3 of 7 (permalink) Old 01-06-2005, 03:17 PM
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I tend to add 1/2 to 1 tsp in my 46g after a 50% water change. So, your levels are similar to mine. I try to get my PO4 around 1 and my NO3 around 10.

46g bf, XP3 w/ vertical spray bar, CO2 w/ SMS122 & diffuser,100% Flourite, 96w+55w cf AHS, AGA Member
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post #4 of 7 (permalink) Old 01-06-2005, 05:04 PM
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i hadnt thought about that before, but water changes actually would take some of the still-present K out of the water. my current calculations have me adding 20ppm of K per week @ ~7ppm 3x each week. If I am doing 3 30% water changes a week (for my Discus), i should be adding more, correct? my water change schedule is on Tuesdays, Thursdays, and one of Saturday/Sunday. Do you think the plants consume the K fast enough that just adding 1/3 after each water change is fine? Or should I make up for the additional amount lost?

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post #5 of 7 (permalink) Old 01-07-2005, 12:22 AM Thread Starter
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Kno3 is usually around 5-6
Phosphates usually around 1-2...........
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post #6 of 7 (permalink) Old 01-07-2005, 12:20 PM
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Overall I think you are dosing a little to much of the K2S04 for a 20g,
Need to find the balance based on your light>C02>nutrients,water volume & plant mass, higher the light=more C02=more KN03 etc.

How much "hight lite" are you talking?

Craig

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post #7 of 7 (permalink) Old 01-09-2005, 07:40 PM
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WOW!!! Seems just a little much!!!

My tank is a 40 gal.

I mix my KNO3 and K2SO4 by adding 2T to 200ml water in individual bottles so I can add seperate. Then from this mixture I would, when I don't have any measurable KNO3, add 20mls of KNO3 to get 5ppm of nitrates. Then I would add double the amount of the K2SO4 mixture.


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