Low kh and ph - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 04-09-2006, 01:05 AM Thread Starter
PTrader: (0/0%)
Join Date: Mar 2006
Posts: 3
Low kh and ph

My kh tested at 1* I never even saw the starting color and my gh was 7*. This seems very low to me. My ph was the lowest color on the chart 6.2 but I suspect it could be lower than that even. I have diy co2 and I have driftwood in my tank. My plants are growing great and my fish are eating well and seem happy. Is my tank in any danger?
Jdatphhs is offline  
Sponsored Links
post #2 of 6 (permalink) Old 04-09-2006, 01:11 AM
Planted Tank Guru
Rex Grigg's Avatar
PTrader: (65/100%)
Join Date: Dec 2002
Location: Portland Orygun
Posts: 9,600
You should get the kH up to around 3 degrees. That will also raise the pH. Do the change slowly.

I have the info in my Guide on how much to use.
Rex Grigg is offline  
post #3 of 6 (permalink) Old 04-09-2006, 01:25 AM Thread Starter
PTrader: (0/0%)
Join Date: Mar 2006
Posts: 3
Since your guide says 1tsp in 13ga of water raises kh by 4* and you said to do the change slowly, would it be safe to add 2tsps of baking soda to my 55ga every time I add my macros (3x per week), test and then adjust accordingly?
Jdatphhs is offline  
post #4 of 6 (permalink) Old 04-09-2006, 02:14 AM
Algae Grower
PTrader: (3/100%)
Join Date: Dec 2005
Location: Park City, UT
Posts: 137
Add about 1/4 tsp at a time, and test your kH and pH after each addition. Wait 30 min - 60 min after adding before you test. Don't raise the pH more than 0.5 units each day. In my experience, 1/4 tsp will raise your pH about 0.3 units and your kH by 0.2 - 0.5. Two tsp of baking soda will raise your pH almost 2 full units! Don't do that!

Al Light
Alight is offline  
post #5 of 6 (permalink) Old 04-09-2006, 02:25 AM Thread Starter
PTrader: (0/0%)
Join Date: Mar 2006
Posts: 3
Woh, good thing i didn't do that. How long should that last it my tank? Should i gradually increase the amount to get to my desired 3* kh?
Jdatphhs is offline  
post #6 of 6 (permalink) Old 04-09-2006, 03:32 AM
Planted Tank Guru
PTrader: (84/100%)
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,012
If you use pressurized CO2 and shut it off at night, the PH will go up as much as one unit by morning. Many of us do that, with no problems. So, I doubt the need to go slowly with raising KH/PH. I do it every water change, and do it by dumping in dissolved baking soda. I probably wouldn't try to raise KH by more than a couple of degrees at a time, but that is hardly going slowly.

Hoppy is offline  


Quick Reply

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:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

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
Trackbacks are On
Pingbacks are On
Refbacks are On

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