They are beautiful! Ive always wanted to venture into them.. but they require brackish water and are prone to shell fungus. Water has to be kept pristine from my research i have done. @Markw84 can prob give u more expert advise
You might want to ask your question in the species specific section on water turtles. You will likely get quicker, more in-depth answers there. Or ask @Yvonne G or another moderator to move this thread to that section.