Due to the fuel shortages and driver shortages in the UK we are experiencing delays in our carbon deliveries. Early ordering is highly recommended.

Targeting Contaminants & Toxins

In Grow-out RAS systems, off-flavour compounds can cause a huge problem for producers. It would be catastrophic for this whole of this newly emerging industry if fish from Grow-out RAS become known for their muddy flavour. And this would be bad news for the planet, as Grow-out RAS offer the potential to produce high-quality protein with low food miles and very limited environmental impact.

Currently, standard practice to deal with Geosmin and MIB – the most common off-flavour compounds – is to purge the fish.

Not only does this require expensive time and equipment, but the fish lose weight during the purge. It also reduces the environmental sustainability of grow-out RAS by hugely increasing the volume of water required to produce each fish.

What if there was a way to stop Geosmin and MIB from building up in the first place?

We have had encouraging results in removing Geosmin and MIB from RAS systems using our bacteria.

Why are Geosmin and MIB a problem in Recirculating Aquaculture Systems?

Geosmin and 2-methylisoborneol (MIB) are a common problem encountered in recirculating aquaculture systems (RAS). These two compounds often accumulate in the water, and then are taken up in the lipids (fatty tissues) of the fish.

In fish, with high lipid content (like Atlantic Salmon) these compounds give the fish a distinctly earthy or ‘muddy’ flavour – in fact Geosmin and MIB are often known as ‘off-flavour compounds’ or OFCs because of this. This earthy taste renders the fish worthless for human consumption.

The production of off-flavour compounds in RAS is mainly due to heterotrophic prokaryotes (types of bacteria and archaea), which produce the compounds. Various methods for dealing with OFCs are used, from purging the fish to using ozone.

However, bio-degradation is now being seen as a more effective long-term method. Bacteria remove the off-flavour compounds that accumulate in the water. However, this isn’t the only mode of action. When using an active microbiome management approach, constant additions of ‘good’ bacteria can also out-compete the heterotrophs which produce the OFCs in the first place.

RAS Right Case Study - Geosmin

Sign up to our newsletter and receive a link to read our recent featured case study, RAS Right Case Study - Geosmin.

RAS Right Case Study - Geosmin

Pease submit your email address below to download this case study.

By clicking submit you agree to be added to our mailing list and to how we will use your data as explained in our Privacy Policy


Contact us to find out more

Where did you hear about us?
If "Other" please specify

By clicking submit you agree to how we use your data as explained in our Privacy Policy


RAS Right Products


RAS-Boost ensures bacteria are fully functional in 7 to 10 days, and the bioreactor can then be kept running as a continuous source of RAS-Right bacteria, often acclimatized to any salinity.

Get in touch

See how we could help your team get the most out of your RAS.

Stay up to date

Nova Q Ltd will use the information you provide on this form to be in touch with you and to provide updates and marketing. Please let us know all the ways you would like to hear from us:

You can change your mind at any time by clicking the unsubscribe link in the footer of any email you receive from us, or by contacting us at This email address is being protected from spambots. You need JavaScript enabled to view it.. We will treat your information with respect. For more information about our privacy practices please visit our privacy page. By clicking below, you agree that we may process your information in accordance with these terms.

We use Mailchimp as our marketing platform. By clicking below to subscribe, you acknowledge that your information will be transferred to Mailchimp for processing. Learn more about Mailchimp's privacy practices here.

Nova Q

Head Office
Unit B21, KCR Industrial Estate, Kimmage, Dublin, Ireland D12 X278

  • email
    This email address is being protected from spambots. You need JavaScript enabled to view it.
Copyright 2021 © Nova Q Ltd. All Rights Reserved. Site Map
Website Design & Development Beyond Your Brand.
This website uses cookies to ensure you get the best experience on our website. Read our Privacy Policy to find out more.