agreed James normal flux in ORP should be that your highest readings occur in the morning when the lights come on...this is when the fish have been inactive for the longest...once they start moving around doing their thing and when you feed, etc., the reading will drop off through the day (if you are not adding ozone); then the reading should be close to what it was the day before the next morning, etc. so with this in mind, you may want to continue to use the probe even if you get variation in reading with other instruments on also, if you move the probe around alot and don't allow for equilibration time (at least 24 hours IMO), then you probably are wasting your time in trying to find the "best" placement in the system...the sump is probably one of the worst spots though because of turbulence; try placing it near your sump discharge line in the tank itself Dave -----Original Message----- From: Payne, James E [mailto:[EMAIL PROTECTED]] Sent: Tuesday, June 26, 2001 1:30 PM To: '[EMAIL PROTECTED]' Subject: RE: ORP > if you are not using ozone or you are not planning on using > ozone or unless > you plan on using it for some type of denitrification > reactor, I don't think > it is important to monitor ORP anyway (anyone have > information contrary to > this?? there may be some critters that are sensitive to > high/low mV levels > that I am unaware of) It's not important, but it's a great indicator of water issues that are about to occur. A stable ORP that suddenly starts rising or falling indicates that something is probably going wrong in your tank, and this knowledge allows you to hunt the problem down and take action as early as possible. I look at it as my early warning system. The values don't matter, as long as it's stable (allowing for appropriate variations during the normal day-night cycle). James Payne [EMAIL PROTECTED] ________________________________________ LEAVING THE LIST ================ To stop receiving messages you will need to send a message to [EMAIL PROTECTED] with a command to remove you from the list. The list manager controls who belongs to the list. For example: -------------------------------------------------------------- From: John Doe <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: <not needed> UNSUBSCRIBE -------------------------------------------------------------- ________________________________________ LEAVING THE LIST ================ To stop receiving messages you will need to send a message to [EMAIL PROTECTED] with a command to remove you from the list. The list manager controls who belongs to the list. For example: -------------------------------------------------------------- From: John Doe <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: <not needed> UNSUBSCRIBE --------------------------------------------------------------
