rvrrays;2495686; said:I do not think that anyone knows for sure.
I have had temporary issues where the water got colder than that but, never for a period longer than 24 hours.
I think that the rays will be fine. Their growth and metabolism will slow down but, they will be fine. I am sure that there are systems in the amazon that get much cooler at certain times of the year than the 80+ degrees we keep them at regularly.
As a matter of fact, I will be shocked if they do not do well for you.
Colin
agree....
severum1;2499576; said:This morning the water was at 18ºC/64ºF. Its dangerously low. Now Im a little bit worried because Im going there only tomorrow afternoon and its when Im going to put the heaters on. I hope that nothing happens until tomorrow.
i had one that the pond gotten down to 58-60f for 2 days... the ray lived but it was sketchy.... hope all goes well alberto...

will follow your step for my next project 