Snipped and saved for reference :-)

I came across what appeared to be a very cheap pH controller from
http://www.monitors-direct.co.uk/
I had my doubts about a controller and probe for under £70,but I've
had it for a month now and so far I have been impressed.
The displayed value correlates with the results from my Hagen pH test,
and when I check the calibration weekly, it's only drifted by about
0.01pH
I don't know how long the gel probe will last - I'd guess at a year or
so, but replacements are widely availabe and monitors-direct sell
probes for about £13
To get the controller for under £70, you have to register at
http://www.reefcove.co.uk/forums/
Go to the Monitors-Direct forum there - the post is at the top.

Hope this helps,
Good luck
Pete


Thanks a lot Pete :-)
P.S.
What lighting are you using ?

Peter