pH rise during photoperiod? - The Planted Tank Forum
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 05-27-2015, 02:05 PM Thread Starter
Planted Tank Guru
klibs's Avatar
PTrader: (29/100%)
Join Date: May 2014
Location: NH
Posts: 3,325
pH rise during photoperiod?

So I manhandled by CO2 regulator and broke a piece so my CO2 injection is out of comission for a few days. Just now I was checking out my Apex graph to look at what my pH is at and it steadily rose 0.3 pH right after the lights turned on.

Why would this happen? It jumped from 7.6 - 7.9 over the course that the lights were on... It has since dropped steadily down back to 7.6

Just curious to know the science behind this...

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.
klibs is offline  
Sponsored Links
post #2 of 2 (permalink) Old 05-27-2015, 03:04 PM
Planted Member
PTrader: (0/0%)
Join Date: Mar 2015
Location: Canadialand
Posts: 161
Consumption of CO2 when the lights come on pulls hydrogen ions out of solution through the bicarbonate/carbonic acid equilibrium. When the lights go off, CO2 uptake drops, levels equilibrate with the atmosphere again, causing the familiar pH drop we all know and love.
Beefy 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