As kegland doesn't have a solution, this may be useful. I use these:
Hose
https://www.bunnings.com.au/pope-10mm-clear-vinyl-tubing-5m_p3130565
Connectors (12mm OD, straight through)
https://www.ebay.com.au/itm/232763935768?hash=item3631cfcc18:g:N~cAAOSwlTBa9Bj7
Cheap, cheerful and it just works.
View attachment 121111
Top work. What model of ffermenter are you using in that photo. I assume you custom made this lid?
The only issue with these fittings are they are not a dry break conneciton so you will get the glycol drain out and make a bit of a mess when you disconnect. Have you found this to be an issue?