I put a little announcement on the French part of Molecularcuisine.org forum to know if someone could sell for a good price an old immersion circulator.
I received a very friendly answer from a University professor, a cooking freak, who is ok to borrow me a Julabo EC during summer holidays. He confirmed this immersion circulator was used to cultivate algae stuff. He said the appliance is safe.
I feel very lucky and thankful to this person that I unfortunately can’t name as he told me to be very discreet (he is not really allowed to borrow me this immersion circulator).
See you in some weeks with my new toy!