Our mission: Setting new standards for evaluating the toxicity of chemicals to fish and for assessing fish health by applying and developing alternative and animal-free models to replace conventional animal tests.


  • We are privately owned and independent, founded in November 2016
  • Received the Spin-off label of Eawag, the Swiss Federal Institute of Aquatic Science and Technology, in 2017
  • Building our business successfully and experiencing growing demands, we opened our own business location and laboratories in Winterthur in October 2021
  • We obtained Good Laboratory Practice (GLP) certification from the Swiss GLP Monitoring Authorities, always aiming at highest quality standards for our clients

Who we are

  • We are four partners with complemental training in biological, toxicological and environmental sciences
  • Together we have more than 30 years of experience in running a business
  • We have highly motivated, well trained and experienced personnel
  • We offer decades of experience in chemical and water testing using alternative methods replacing fish toxicity tests
  • We developed a cell-based OECD test guideline and ISO standard

aQuaTox-Solutions Partners

From left to right:

Prof. Dr. Kristin Schirmer, CMO and Division Head Chemicals & Products

PhD in Biology from the University of Waterloo (Canada) and Adjunct Prof at ETH Zürich (Switzerland)

Dr. Stephan Fischer, CEO and Division Head Water Quality and Fish Feed & Health

PhD in Environmental Sciences at Eawag and ETH Zürich (Switzerland)

Melanie Fischer, CTO

MSc (FH) from the University of Applied Sciences Mittweida (Germany) in Environmental and Biotechnology

Prof. Dr. Mario Schirmer, CFO

PhD in Hydrogeology from the University of Waterloo (Canada) and Adjunct Prof at University of Neuchâtel (Switzerland) and Laval University (Canada)