K2co3 where to buy - The Planted Tank Forum
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post #1 of 8 (permalink) Old 02-06-2019, 04:52 AM Thread Starter
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K2co3 where to buy

My KH is zero and I plan to raise it to 1 and want to use K2CO3. Any suggestion on where to buy K2co3? I plan to just add it to my RO water.
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post #2 of 8 (permalink) Old 02-06-2019, 01:37 PM
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I know you are looking for K2CO3 specifically, but because you mentioned target 1 dKH, why not use kitchen baking soda. It adds only 8 ppm Na and is widely available.
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post #3 of 8 (permalink) Old 02-06-2019, 05:07 PM Thread Starter
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I did use baking soda but my tankwater had a huge amount of tanning looking color to it. I stopped using it after I read somewhere that the baking soda reacts with ADA Amazonia in that way and the color of the water got better. Now I may just imagine it too...

Anyway, a lot of the top people here use K2CO3 for high tech tanks so I figured I should jump on the bandwagon.
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post #4 of 8 (permalink) Old 02-06-2019, 05:38 PM
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post #5 of 8 (permalink) Old 02-06-2019, 05:40 PM
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Amazon, but if you've got active ADA soil don't try and raise kH unless you are purposely trying to exhaust the Aquasoil of its buffering ability.
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post #6 of 8 (permalink) Old 02-06-2019, 06:09 PM Thread Starter
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Amazon, but if you've got active ADA soil don't try and raise kH unless you are purposely trying to exhaust the Aquasoil of its buffering ability.
I keep hearing both sides here and can't make up my mind. KH at 0 is ok then for a heavily planted tank for the plants? I wonder if I should dose some extra K to make sure I have enough.
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post #7 of 8 (permalink) Old 02-06-2019, 06:50 PM
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I keep hearing both sides here and can't make up my mind. KH at 0 is ok then for a heavily planted tank for the plants? I wonder if I should dose some extra K to make sure I have enough.
kH does not = K
K = Potassium - Plant macro nutrient
kH = Carbonate hardness - "measurement" of CO3

Aquasoil buffers kH out of the water and "stores" it thus lowering pH.

Tanks with inert substrates use kH as a buffering "agent" to prevent non-CO2 related pH swings.
Tanks with aqua soil can get away with no kH because the substrate buffers the water and prevents non-CO2 related pH swings.

By dosing kH into a tank with aqua soil, you'll be "fighting" the buffering ability of the aqua soil, eventually depleting it to a point where it will act like an inert substrate (in terms of kH / pH).

Plants typically do better in soft water .... low kH....

= Aquasoil tank or inert substrate with a low kH.

Correct me if I'm wrong ADA soil users, as I have not personally used it before....
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post #8 of 8 (permalink) Old 02-06-2019, 07:58 PM Thread Starter
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Quote:
Originally Posted by Quagulator View Post
kH does not = K
K = Potassium - Plant macro nutrient
kH = Carbonate hardness - "measurement" of CO3

Aquasoil buffers kH out of the water and "stores" it thus lowering pH.

Tanks with inert substrates use kH as a buffering "agent" to prevent non-CO2 related pH swings.
Tanks with aqua soil can get away with no kH because the substrate buffers the water and prevents non-CO2 related pH swings.

By dosing kH into a tank with aqua soil, you'll be "fighting" the buffering ability of the aqua soil, eventually depleting it to a point where it will act like an inert substrate (in terms of kH / pH).

Plants typically do better in soft water .... low kH....

= Aquasoil tank or inert substrate with a low kH.

Correct me if I'm wrong ADA soil users, as I have not personally used it before....
I meant I should dose some extra K if I don't add the KHCO3 through other means. Well I will skip this then and continue on my path to an algae free paradise!
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