which mix ??? pls help - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 08-01-2012, 11:57 AM Thread Starter
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which mix ??? pls help

ok, i have potassium phosphate, potassium nitrate and magnesium sulphate which ones do i mix to make which elements
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post #2 of 3 (permalink) Old 08-01-2012, 12:59 PM
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KN03 -potassium nitrate
KH2P04-potassium phosphate
read the sticky and use dry powders
https://www.plantedtank.net/forums/sh...ad.php?t=21944
magnesium sulphate- part of Gh booster-if your tap water is very soft
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post #3 of 3 (permalink) Old 08-01-2012, 03:08 PM
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KNO3 is used to supply nitrogen. If your tank has a lot of fish you might not add much of this. Fish food might supply enough nitrogen that you need only a little KNO3.
If you add a lot of KNO3, then that is enough to count as a supply of potassium, too. But if you are not adding very much, then you are not adding enough K.

KH2PO4 is a source of phosphate. You will not use much, so it does not count as a source of K. You might not need any, if the fish food supplied enough.

K2SO4 is a source of potassium. If you need only a small amount of KNO3, then you might need to add more K, and this is the most common form.

Epsom salt is a source of magnesium. If your GH is low you might also need calcium. Plants use Ca and Mg in a ratio of something like 3 or 4 parts Ca to 1 part Mg.
I would not dose Epsom salt to correct low GH without also testing the Ca. You might need to dose Ca as well as Mg.
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