What is a balanced Redox?
ORP is a term used frequently in the water treatment food processing industry. .This improvement/difference was noted over tanks kept with more traditional methods such as "Amazon" biotopes where RO water was used and no replacement mineralization (Cation replacement) was used on an on going basis.Originally my statement on Redox was: "I do not believe this is a subject that many aquarists should stress over", but a lot has been learned about this subject since I first started researching this in the 1980s.Glass of water, then add enough Potassium Permanganate to change the color to a mild red, then take any aquarium water conditioner such as Prime or Start Right and slowly add drops to the water and watch the red be "reduced" (neutralized) to a clear.Reference: Aquarium Chemistry; TDS Please read on as I will go into further depth as the article progresses, especially as Redox relates to aquatic health.Even lighting and quality of light is showing to have an affect on Redox based on tests!It is somewhat important to note that ORP and rH scores have also been used to some extent for many years in the groundwater and waste water remediation fields as well as measures of relative oxidation or reducing ability of water.If your aquarium has a high bio load, the addition of a properly installed UV Sterilizer can actually temporarily add too much Redox Reduction resulting in a darkening of water color until the Aquarium Redox balances again.Advertisement Oxidized Water: Oxidized water with its Redox potential of 700 to 800 mV * is an oxidizing agent that can withdraw electrons from bacteria and kill.Reduced water inhibits excessive fermentation by reducing indirectly metabolites.Reduction is the gain of electrons by a molecule.The metallic electrodes are connected to a high resistance voltmeter.I have found from practical experience and research that often a lot more can be learned from medical studies or other university level studies than from many aquarium articles and sadly some otherwise excellent forums (these articles/forums usually just take bits from another article without.Therefore, an rH score of 0 would indicate maximum possible reducing (antioxidant) power, while a score of 42 would indicate the maximum possible oxidizing environment.Slow (or low level) to Medium Oxidizers: Products such as Methylene Blue (at high concentrations.Purigen and especially Chemipure along with "The Poly Filter Pad" are more "medium" oxidizers so extra care should be exercised with their use.Please note; many UV Sterilizers code reduction camaieu mars 2018 now marketed for under 50 cannot perform Redox reduction due to their poor dwell time, low cost medium pressure UV bulbs, and other factors, these are at best clarifiers and should never be purchased unless that is all you desire.EMF of a galvanic cell is a resulting sum of potential differences of the anode and cathode: E0 Ecathode - Eanode to top Standard electrode potential is the electromotive force measured in the Galvanic cell consisting of the half-cell with the electrode under standard conditions.
The best definition I can give is that ORP is a measure of the cleanliness of the water its ability to break down contaminants. .
Often, we as aquarium keepers perform methods to counter oxidative stress without even knowing it, this includes GH boosters used in the "Estimative Index Of Dosing" for planted aquariums.