Comments on: Oxydative Redox Potential (ORP) http://www.aquaristsonline.com/blog/aquarium-care/water-quality/oxydative-redox-potential-orp/ Information And Resources For Anyone Interested In Aquarium Fish, Saltwater Aquariums, Tropical Fish, Home Aquariums. Aquarium Care, Aquarium Equipment And Much More. Mon, 06 Feb 2012 11:21:50 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: John http://www.aquaristsonline.com/blog/aquarium-care/water-quality/oxydative-redox-potential-orp/comment-page-1/#comment-4384 John Thu, 06 Dec 2007 00:01:42 +0000 http://www.aquaristsonline.com/blog/water-quality/oxydative-redox-potential-orp/#comment-4384 Hi. Thanks for the input and the link. A difficulty faced on a site such as this is to attempt to keep everything at its basic level. A very knowledgeable person would consider 'basic' to be too simplified. A point was made on the basic nature. I know there isn't any comment on this but I thought I would explain why it is done this way. A sort of 'research further if you wish to' approach. The - redox potential level for a denitrator was taken from the reference given. A too high redox potential is not desirable. The highest level given as an example is +300. A caution is given about ozone, and also about raising the level being potentially harmful within the aquarium. The hope is that the basic workings will be understood along with the potential dangers. Further consideration of the problems/advantages can be made if desired. It is pleasing that interest is taken such as yours, and thanks again for the link. Hi.
Thanks for the input and the link.
A difficulty faced on a site such as this is to attempt to keep everything at its basic level. A very knowledgeable person would consider ‘basic’ to be too simplified. A point was made on the basic nature. I know there isn’t any comment on this but I thought I would explain why it is done this way. A sort of ‘research further if you wish to’ approach.
The – redox potential level for a denitrator was taken from the reference given.
A too high redox potential is not desirable. The highest level given as an example is +300.
A caution is given about ozone, and also about raising the level being potentially harmful within the aquarium.
The hope is that the basic workings will be understood along with the potential dangers. Further consideration of the problems/advantages can be made if desired.
It is pleasing that interest is taken such as yours, and thanks again for the link.

]]> By: Carl Strohmeyer http://www.aquaristsonline.com/blog/aquarium-care/water-quality/oxydative-redox-potential-orp/comment-page-1/#comment-4235 Carl Strohmeyer Tue, 04 Dec 2007 01:17:23 +0000 http://www.aquaristsonline.com/blog/water-quality/oxydative-redox-potential-orp/#comment-4235 I have to respectfully disagree with many of these conclusions. The Redox Potential (oxidation potential) describes the ability for the loss of an electron by a molecule, atom or ion to the gain of an electron by another molecule, atom or ion. Without this ability to gain electrons many minerals cannot be absorbed and properly assimilated. A positive Redox or Oxidation describes the loss of an electron by a molecule, atom or ion A negative Redox describes Reduction which is the gain of an electron by a molecule, atom or ion Oxidized water with its Redox potential of +700 to +800 mV is an oxidizing agent that can withdraw electrons from bacteria and kill them. HOWEVER, reduced water with a Redox Potential of -250 to -350 mV readily donates its electrons to unusual oxygen radicals and blocks the interaction of the active oxygen with normal molecules. Substances which have the ability to counteract active oxygen by supplying electrons are called scavengers. Reduced water, therefore, can be called scavenging water. Reduced water inhibits excessive fermentation by reducing indirectly metabolites. The bottom line is long term high Redox is not beneficial to life in the aquarium and should be avoided. Please see this article: http://www.americanaquariumproducts.com/Redox_Potential.html I have to respectfully disagree with many of these conclusions.
The Redox Potential (oxidation potential) describes the ability for the loss of an electron by a molecule, atom or ion to the gain of an electron by another molecule, atom or ion. Without this ability to gain electrons many minerals cannot be absorbed and properly assimilated.

A positive Redox or Oxidation describes the loss of an electron by a molecule, atom or ion

A negative Redox describes Reduction which is the gain of an electron by a molecule, atom or ion

Oxidized water with its Redox potential of +700 to +800 mV is an oxidizing agent that can withdraw electrons from bacteria and kill them.

HOWEVER, reduced water with a Redox Potential of -250 to -350 mV readily donates its electrons to unusual oxygen radicals and blocks the interaction of the active oxygen with normal molecules. Substances which have the ability to counteract active oxygen by supplying electrons are called scavengers. Reduced water, therefore, can be called scavenging water. Reduced water inhibits excessive fermentation by reducing indirectly metabolites.

The bottom line is long term high Redox is not beneficial to life in the aquarium and should be avoided.

Please see this article: http://www.americanaquariumproducts.com/Redox_Potential.html

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