Acceptable Temperature Options

[juppie4]

Hi,

I have recently had to put my fish outside into a tub, due to space problems, the more people living in the house the less aqauriums im aloud

I live in the UK and while it is getting warmer at the moment the nights are still cold and currently the water temperature is 14C! The fish seem to be doing fine and I have kept a moor and ryukin in these conditions for a few weeks now. however the fish in the large outdoor tub are now 4 ranchu and 1 ryukin. Will they be fine in these conditions until it warms up?

I have read in many places that the acceptable temp for Ranchu is between 18C-28C?!?!?

Any advice would be greatly appreciated!

Thanks.