Hi, mine also are still not breeding because too young.
I´m now thinking if I shall leave the three phoenicurus (which I can´t see all three at the same time) in the small tank (40x25x25) or if they would be better in my new made tank 40×30 (front ) and 60 cm back/deep with a diversity of caves (so they won’t have to do camping 😉 ) or if I shall wait till they begin to spawn in some weeks or months and move the young linkei in the bigger tank to leave the parents with their baby offspring. What do you think?