I am looking at getting a trio soon. I have raised many rays in the past. I know they can be harder to raise. My questions are is the temp to keep them at lower then most rays? I dont remember witch has a lower temp. Also has any new info been gain in how to keep them better since a handful of years ago? I was going to get some a handful of years ago but didnt because it seemed most didnt last long and we were all still learning about them.