User Name

Registration is FREE. Click to become a member of OrchidBoard community
(You're NOT logged in)

menu menu

Donate Now
and become
Forum Supporter.

Many perks!



Fauna Top Sites
Register Members O.C.D. Search Today's Posts Mark Forums Read
Unread 05-27-2009, 12:59 AM
Ben Belton's Avatar
Senior Member

Join Date: Mar 2007
Location: Mayberry, NC
Posts: 612
Default Media pH

How do you test the pH of your media?

Lots of people test it before they add the agar, but agar will decrease your pH. If the media is hot enough to melt the agar, then it is too hot for my pH pen. I would use the strips, but the agar I'm using has charcoal in it and that makes the strips hard to read.


Reply With Quote
Unread 05-27-2009, 10:08 AM
Senior Member

Join Date: Jan 2008
Zone: 8a
Location: Piney Woods of East Texas
Age: 37
Posts: 3,258


The media I use is complete with agar. I tried checking it with my "pen" but the heat and agar messed with the probe.

I have since gone to strips when (if) I check pH. I don't even check my standard media anymore. It always reads the same. The strips are tricky but I found some with 5.5 and 6.0 "pads" that are a nice green color that are easy to see through any charcoal grit.

Last edited by Royal; 05-27-2009 at 10:11 AM..
Reply With Quote
Unread 05-28-2009, 05:50 PM
Ben Belton's Avatar
Senior Member

Join Date: Mar 2007
Location: Mayberry, NC
Posts: 612

Yeah, I usually get media without agar because it always seems there is too much.

OK, thanks. I'll keep working with it.
Reply With Quote
Unread 05-28-2009, 06:09 PM
Des Des is offline
Senior Member

Join Date: Nov 2007
Location: Port Elizabeth
Age: 67
Posts: 898

I just take a sample and let it cool before testing .
Reply With Quote
Unread 05-28-2009, 06:53 PM
Senior Member

Join Date: Nov 2007
Zone: 7a
Location: Powhatan VA
Posts: 190

I do the same as Des take a small sample and let it cool then use test strips. The media I use are pretty consistant, so after making the same adjustments for several batches I forgo the test and adjust with the same quantity of KOH to give the pH I want.
Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Is there a 100% homemade media recipe that doen't require replating? altcuban Propagation 30 07-30-2009 04:25 AM
Types of media for stem propagation AAWilliams Propagation 2 08-18-2008 09:03 PM
Malmgren media preparation Intruder Propagation 5 06-06-2008 08:30 PM
Germination Media for Phals? Royal Propagation 13 05-18-2008 02:21 PM

All times are GMT -4. The time now is 06:28 PM.

© 2007 OrchidBoard.com

Clubs, ShowCase vBulletin Plugins by Drive Thru Online, Inc.

SEO by vBSEO 3.6.0