Reducing space under paragraphs

Hi I've been using Catch Evolution Pro Theme for about a month now (not yet without the slider function), and I'm very happy with it except for one thing: I would like to reduce the space between two prargraphs of text. And I can't find the proper setting in the css... Same problem in text widgets in the right column, by the way (blogroll). Blog ist http://www.zpoblog.de Any help would be fantastic. Benedikt