KH and PH - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 03-01-2016, 04:44 PM Thread Starter
Algae Grower
PTrader: (0/0%)
Join Date: Jan 2015
Location: Montreal
Posts: 9
Red face KH and PH

Hi guys quick question today.

Right now my Kh is around 5.5. To get my target CO2 of 25PPM I need to lower my PH to around 6.8.

Problem is I have 2 beautiful nerite snails in this tank. If I wanted to get the PH to 7 so I don't get calcium deficiency with them, would I only need to raise the KH with the old Arm and Hammer?

And what would be the dosage to get myself atleast to 7Dkh so I get 25PPM and Ph7? Tank is a 34US gallons.

Do I slowly add Carbonate or I dose one shot!! Got White clouds and SAE right now, but will be adding Gourami and Corys.

Thanks in advance
Serragard is offline  
Sponsored Links
post #2 of 4 (permalink) Old 03-01-2016, 05:12 PM
Wannabe Guru
hbosman's Avatar
PTrader: (2/100%)
Join Date: Oct 2006
Location: Leesburg Virginia
Posts: 1,728
For calcium deficiency, I would think you would be concerned with GH, not KH.
hbosman is offline  
post #3 of 4 (permalink) Old 03-01-2016, 05:16 PM
Planted Tank Obsessed
end3r.P's Avatar
PTrader: (2/100%)
Join Date: Aug 2015
Location: Atlanta, GA
Posts: 402
Are you using pressurized CO2? Pretty sure whatever CO2/KH/PH table doesn't apply if you're not.

And that difference in pH is not going to affect your snails. GH is the applicable measure that you need to keep up for them.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
end3r.P is offline  
post #4 of 4 (permalink) Old 03-01-2016, 07:03 PM
Planted Tank Guru
PTrader: (6/100%)
Join Date: Jul 2015
Location: US
Posts: 2,862
Snail shells are actually made of Calcium Carbonate. So therefore in the name, Calcium, and Carbonate, both GH (calcium) and KH (carbon) values would determine their shell health (in turn, whether they can survive). The outer hard shell layer is made of calcium, while the inner soft "shell" layer is composed of carbonate.

If you get whitening of the snail shells it's a calcium deficiency. Or possibly too acidic water, which would also dissolve the calcium layer and the carbonate layer would be compromised as well.

Look up "Ocean Acidification" (you can add in "calcium carbonate" in the search as well).
Here's a decent article Ocean Acidification | Smithsonian Ocean Portal
Yes, it does refer to sea water, but the same acidification principle can take place in freshwater as well, even with co2 injection. Pretty much co2 as we know, chemically reacts with the water, creating carbonic acid, which ends up increasing the amount of Hydrogen ions and lowering pH. Snails use calcium ions to bond with carbonate to create their shells (calcium carbonate), however those hydrogen ions (H+) have a stronger/faster bond with carbonate (creates bicarbonate), and with the increase of H+ they take away/use up the carbonate that the snails need to build/maintain their shells, ultimately leading to deteriorating snail shell health and possibly killing it.

With too low KH/pH/too acidic water, you could see snails' shells dissolving/eroding/pitting, good chances of dying if not placed in suitable water.

Here is a rather easy to understand basic chemistry explanation of aquarium water.
Water Hardness

Not everything can live happily the same water conditions.
WaterLife 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