FAQs

Most frequent questions and answers

SAO uses advanced technology to convert oxygen (O2) in the air into ozone (O3) and infuses it into cold tap water to create a powerful cleaner, deodorizer, and sanitizer without using chemicals. The ozone is attracted to bacteria, germs, and other contaminants and eliminates germs, bacteria and mold, leaving only water and pure oxygen following the cleaning process.

Tersano’s Stabilized Aqueous Ozone (SAO®) and its effectiveness against SARS-CoV-2 (coronavirus) continues to receive global scientific validation.


We are excited to share the most recent peer-reviewed study, published in the February 26, 2021 edition of the academic journal Environmental Research.

Testing was conducted at the University of Queensland, St. Lucia, QLD, Australia confirming that SAO solution demonstrated safe and effective disinfecting properties when using municipal water passed through a
Tersano SAO-24 cartridge.

Two clinical isolates of SARS-CoV2; an early Australian isolate QLD02 sampled from a patient on 30/01/2020, and the more recent isolate QLD935 sampled from a patient on 25/03/2020 were tested for inactivation by Stabilized Aqueous Ozone.


At 0.75 ppm (or 850mv) the SARS-CoV-2 virus was inactivated to the highest detectable level.


These test results correlate with the prior studies such as the one conducted by Fujita Health
University in Toyoake, Aichi, Japan, demonstrating the efficacy of Stabilized Aqueous Ozone at inactivating SARS-CoV-2.


The Australian study also conducted testing to confirm the extended half-life of ozone when using SAO technology over traditional aqueous ozone (AO). Results confirm a significant extension, validating Tersano’s claims around this globally patented technology.


Here is a link to the report

The Safety Data Sheet (SDS) of SAO is 0-0-0-A. The use of protective gear should be worn at your discretion, according to the organic matter or pathogens you are coming into contact with.

SAO will not remove wax from a floor surface. Many current customers report that floor finishes last longer. Third party testing also exists for improved gloss and slip-and-fall levels.

The dispenser will shut down and give an error if SAO is not being produced. Also, Tersano has built-in sensors to monitor proper levels created.

Yes, the manufacturer recommends the cold water supply be in the OFF position when not in use and that the cold water tap is turned off as well.
This indicates there are approximately 200 litres of solution left on the cartridge. Ensure you have a new Tersano SAO cartridge in inventory.

Ensure that the replacement blue desiccant filter matches the SAO cartridge (they will have identical serial numbers). Insert blue filter into dispenser until you hear a ‘click’. Ensure that cartridge connectors are properly inserted.

It is likely that someone is alternating chemicals with SAO in your cleaning regiment. SAO will attack the layers of chemicals until it reaches the natural surface. To achieve optimal results, SAO should be used exclusively.

Replacement of existing cleaning supplies are not necessary. Rinsing existing supplies thoroughly with SAO will be sufficient. Tersano SDS labels are available for the spray bottles.

Applications include carpets, stone, marble, ceramic, glass, mirrors, bathrooms, stainless steel & chrome, TV monitors, computer screens, appliances, white boards, hardwood and vinyl. SAO is an approved sanitizer that also deodorizes and works well at removing salt residues in the winter.

SAO replaces sanitizers and deodorizers as well as neutral, stainless steel, carpet cleaners, all-purpose and glass cleaners.

SAO is intended to fill mop buckets, auto-scrubbers, carpet extractors and spray bottles for the purpose of cleaning, removing stains, deodorizing and killing germs. The solution is not intended for consumption, but it will not harm someone if they accidentally drink it.

It is not recommended that any chemical be used with the SAO solution. Chemicals will negate the ozone in the water.

The Stabilized Aqueous Ozone kills mold. In order to remove dead spores, areas must then be scrubbed.

The first things to check are:

  • ensure the flow jet is clean,
  • ensure the water source is turned on, and
  • ensure the power is connected to the unit.

If all of the above are confirmed then ensure the hose connectors on the stabilizer are installed properly and locked in place.

DO NOT BLOCK or reduce the flow from the SAO OUT hose with any type of shut-off device or nozzle – this may damage the unit and will void the warranty.

The cartridge and blue desiccant filter must be replaced. Follow the instructions to change cartridge on the User Guide. Ensure the blue desiccant filter is inserted into the High Capacity Unit Housing and snapped into place. When it is in place you will hear it click into position and if you pull on the filter it will not remove from the housing.

Clean does not smell. The smell of lemon, pine, etc. in traditional cleaning chemicals indicates the presence of harmful chemical additives that can cause irritation.

PROscrub is Tersano’s deep cleaner and degreaser lifting years of built-up chemical residues, dirt, grime and grease in just seconds. It is an excellent complement to a daily SAO cleaning regiment.

The SAO replaces sanitizers and deodorizers as well as neutral, stainless steel, carpet cleaners, all-purpose and glass cleaners. It DOES NOT replace your current hospital-grade disinfectant.

More FAQs

On June 9, 2014, Tersano received a letter from Green Seal stating that its stabilized aqueous ozone meets the GS-37 and GS-53 standards for cleaning products – with both including a specific standard for cleaning performance. The letter can be viewed at Tersano.com.

On July 30, 2015, Tersano received a similar letter from the Green Clean Institute which has similar standards for cleaning performance. This letter can also be found at Tersano.com.

Over a period of two years between 2014 and 2016, McDonald’s franchises in Europe tested the efficacy of stabilized aqueous ozone as a cleaner in their restaurants. The solution passed their stringent cleaning standards and today stabilized aqueous ozone is on the approved list of cleaners and sanitizers for McDonald’s.

The Lotus® PRO, which produces stabilized aqueous ozone has TUV certification. Tersano hired the North American division of TUV to assist with approvals to UL, CSA, and other global electrical safety standards. During the UL-standard testing, TUV also tested to OSHA standards ensuring no ozone gas is emitted.

On February 26, 2016, scientists at MycoScience laboratory confirmed that stabilized aqueous ozone kills staph and e.coli to a 5-log reduction on food-contact surfaces. Results from Lapluck laboratory shows a 3-log reduction in 30 seconds for non-food contact test. The test document that confirms this bacterial elimination can be found at Tersano.com.

On June 14, 1997, a panel of scientists from the Energy Power Research Institute declared aqueous ozone GRAS meaning it is generally regarded as safe by the scientific community.

On June 26, 2001, the FDA ruled that aqueous ozone is safe for use as an antimicrobial agent for meat and poultry processing and storage. Shortly thereafter USDA ruling CFR 173.368 stated that aqueous ozone can be safely used in the treatment, storage and processing of foods.

In April of 2014, the composition of Tersano’s stabilized aqueous ozone was scientifically analyzed and found to be safe for humans, animals and the environment, receiving an MSDS rating of 0-0-0-A. This document can be found at Tersano.com.

In December of 2014, the composition of Tersano’s stabilized aqueous ozone was analyzed by Dell Tech Laboratories for a safety data sheet and was found to be safe for use by humans and around animals, receiving a rating of 0-0-0-A. This document can be found at Tersano.com.

Each of these governmental rulings can be found at their respective organizational websites.