Some bits and pieces of info from lecture about turtles living in Čambal (gharial pavilion), video is on zoo´s Youtube channel but without subtitles:
They still don´t know how to hatch female crowned river turtle (Hardella thurjii) from eggs. In turtles and tortoises, gender of future offspring is usually decided by temperature during incubation (and lower temperature leads to males). But with so little detailed info on this species both from nature and captivity, it´s difficult to find the correct method. All offspring hatched so far is male only. They are down to 1 adult female.
Subadult Indian roofed turtles (Pangshura tecta) will be moved into the main exhibit with gharials before the year-end. They came 3 years ago as little babies and keepers waited for them to grow enough to be safe in that big basin.
The whole group of adult southern river terrapins (Batagur affinis) will be sent away from zoo. Because of their origin from tropical Malaysian peninsula, they require higher water temperature then animals coming from northern Indian subcontinent. The zoo is now heating the Čambal house enough for them to be comfortable. But it´s a little too hot for gharials and other turtles living with them. The only juvenile southern river juvenile terrapin (offspring of the current group) will be spared and remain living in the Indonesian house, in a fish tank direct after its entrance. The adult group will not be placed into the Indonesian house, they lived there in orangutan moat previously and it caused many heath problems, the water quality is not good enough for river terrapins.
A new species of river terrapins is expected to arrive. Date is uncertain, maybe next year. They should replace B. affinis in the main basin. However I am unsure about the future species. The head keeper in that lecture mentioned northern river terrapin (Batagur baska). But zoo director mentioned in an interview a long time ago the zoo will import Bengal roof turtles (Batagur kachuga) from India. Probably that deal fell through and B.affinis is a compromise solution because it can be sourced within Europe.