i desperately need to move my 2-3 inch normal (i.e. not fancy) goldfish into my outside pond. they are in a tank which is way too small for them but i'm wondering if its too old for them outside. it is consistently 11oC at the moment in the pond and i have some other goldfish of the same size and also some big koi carp. i will check the temp in the early morning but do you think they would be ok.
would it be a good idea to put them in the conservatory for a week first to make the temp gap easier (it's 18oC in the tank, 14/15 oC in the conservatory)