The Planted Tank Forum - Reply to Topic
Thread: potassium carbonate question Reply to Thread
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the The Planted Tank Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
11-18-2012 09:32 PM
chibikaie Thank you for the link! I've been wondering if I could use potassium bicarbonate in a similar manner, and that answers my question neatly.
11-18-2012 01:26 AM
KH2PO4 From
1.2g K2CO3 in 25 litres of water = 2 dKH

By adding K2CO3 to reach 1 dKH, you also get about 13 PPM of K.
11-17-2012 11:57 PM
Gold Finger Also, I believe potassium carbonate (K2CO3) adds ~33mg/l K+ along with each 1 degree of hardness added by the CO3 just like K2SO4 does. It works well but you have to understand and want the K+ ratio. lots of extra K seems fine, but plants don't need KH so it's just a pH buffer issue. If you have two or three degrees in your tap I would not bother raising it. Over four degrees can limit some plants. Otherwise K2SO3 is supposed to be a good way to raise KH.
11-17-2012 10:31 PM
wkndracer If you have a gram scale measure doses and mix into a 5g bucket then test results to establish adjustment values. (what I did)

W/O a scale do leveled mixing spoons 1/2 & 1tsp but realize that compaction and moisture effect the values slightly more than the scale but it's still minor.
11-17-2012 10:15 PM
potassium carbonate question

Does anyone have any advice for dosing pottasium carbonate for kh?

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

For the best viewing experience please update your browser to Google Chrome