Can you have a filter? If so, I was wondering if there are any shrimps or other inverts that would be OK in an unheated tank - but am too much of a newbie to actually know the answer. 
I've just been having a search on the coldwater and inverts boards for you - and get the impression that there might be some options....

I've just been having a search on the coldwater and inverts boards for you - and get the impression that there might be some options....
