They are both the same - just depends where you prefer the decimal point! microSiemans vs miliSiemans - 1 micorSieman (mS) = 1000 miliSiemans (uS)

I think mS is the more common unit of measurement in our application - as most books, and nute labels, for example, will refer to EC as 2.0mS rather than, 2000uS - seems more likely to confuse with PPM's too! Note 1000uS = 700PPM (unless calibrated otherwise)

Quick question. If I am filtering/scrubbing the room with an INTERNAL activated carbon filter/scrubber, will it absorb CO2?

I've been following this thread almost from the beginning (and now we just passed 500 pages!), and mostly all I have been able to contribute is questions asked. So...to offer something more substantial, I have created a PDF of the first 500 pages of this thread. Of course it comes out to substantially more pages in PDF format! This was a labor of love as it takes forever to remove all the extraneous info that shows up as you copy each page. I will update the pdf every 100 pages that are added to this great thread and let you know when I do it.

Below is the URL to go to for the pdf. It is just a tad under 40 megs, so I hope most of you have a high speed connection. It is a free site so click on the appropriate links to get to the download page. And only one person can d/l at a time, so have patience.

The neatest thing about having the whole thread in PDF format is that it is easy to search for anything by word association. This should be helpful especially for newbies to this thread, but hopefully the oldtimers find it useful, too.

Here is the link:

<a href="http://www.filefactory.com/file/aga8..._pdf">Download Harvest a LB every 3 weeks.pdf from FileFactory.com</a>

Update: Here are two more links to download from

Download Mirror 1

Download Mirror 2

Wow... nice work Shrike

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You're welcome, SoG. You and Stink contribute so much to our knowledge on this board. I am proud to be in all your company. If there ends up being a real need for the pdf's, I'll be happy to post some more up in the day's ahead. I have your threads and some other contributors that stinkbuddies might be interested in.

very important what you have just did, I've had my share of time on the net
peps may not realize it now, but when they'd need it and the site is down
this is GOLD

btw: I'm your first copy downloader, i think

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Yeah...that's why I originally started creating the pdf. I was so afraid that this site would go down or heaven forbid, go away completely. I couldn't stand the thought of all this great info...and it is fantastic info...wisping away into cyber oblivion.

Cool...if you're the first one, will you make sure it d/l's and looks okay?

I'd appreciate it.

find a new host for that pdf.....

Sorry, there are currently no free download slots available on this server.

Please try again later, or you can upgrade to FileFactory Premium below for instant access.

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completed downloading, copy looks great!
I'm prob not the first one to tell you this but,
YOUR NUTS that's 2794 pages
Kudos bra

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Yeah...I said in my post that it is a "free" site I posted it on, so only one person get's to d/l at a time. Have patience and you'll get it in time.