Reef Central Online Community

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > General Interest Forums > The Reef Chemistry Forum
Register Blogs FAQ Calendar Mark Forums Read


User Tag List

Thread Tools
Old 03/17/2009, 06:35 PM   #1
Moved On
Join Date: Jun 2004
Location: Indianapolis
Posts: 839
ORP Value in My Tank????

I just recently purchased a controller with ORP controller/monitor.

I finally got a ORP probe and my established SPS reef has a reading of 197-207 and my Ph ranges from 7.85-8.21 depending on the time. Alk is 3.89 meq/L and Calcium is 420.

This has been the last 24 hrs worth of readings,

I am wondering what is an acceptable ORP range or is there actually one???

I read through Randy's article in reefkeeping magazine and honestly still don't understand???

BLANKENSHIP76 is offline   Reply With Quote
Old 03/17/2009, 08:49 PM   #2
Bomb Technician (EOD)
Boomer's Avatar
Join Date: Aug 2002
Location: Duluth, Minnesota
Posts: 11,883
It takes time to break in an ORP probe in seawater. Check back in a week or two. Did you check its "calibration" ? A well run reef tank will run near 400 without ozone. Most run in the lower 300's. Fresh salt mix or a new tank will run in the mid 200's.

If you See Me Running You Better Catch-Up

Seawater Chemistry, Geology, ID Marine Life, Collecting Science Books, Explosives Technology, Audiophile

An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be.
Boomer is offline   Reply With Quote
Old 03/18/2009, 05:41 AM   #3
Randy Holmes-Farley
Reef Chemist
Randy Holmes-Farley's Avatar
Join Date: Apr 2001
Location: Arlington, Massachusetts
Posts: 86,408
In general, I wouldn't focus on ORP itself as a goal, especially not when modified with oxidizers such as ozone or antioxidants such as vitamin C.

I discuss it here:

ORP and the Reef Aquarium

Randy Holmes-Farley

Current Tank Info: 120 mixed reef
Randy Holmes-Farley is offline   Reply With Quote
Old 03/18/2009, 06:26 AM   #4
Moved On
Join Date: Jun 2004
Location: Indianapolis
Posts: 839
I did calibrate it in Pinpoint solution. As far as a well run reef tank, mine is nice established reef with no problems and good growth.

However, I have been running a way undersized skimmer for 3 weeks after I sold my old one, and put a new Royal Exclusiv cone on pre-order. So, I am wondering if that may be my issue, since I have been doing 30 gallon water changes every 5 days.

Anyway, I will read up on the ORP, and see what I need to do.

BLANKENSHIP76 is offline   Reply With Quote
Old 04/06/2013, 09:31 AM   #5
Registered Member
deazwe's Avatar
Join Date: Sep 2012
Location: St Louis
Posts: 15
By the way Randy, I like your phosphate ion (PO4 -3) ion as an avatar....

deazwe is offline   Reply With Quote

Thread Tools

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 On

Forum Jump

All times are GMT -6. The time now is 06:13 AM.

TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright 1999-2014
User Alert System provided by Advanced User Tagging v3.3.0 (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.