Changing space between paragraphs

Hi Sakin, Got another question for you :) I think the space between paragraphs is perfect, however, when I put an adsense link unit beneath a subheading (H2) it doesn't look good. If you look at the page http://thejuiceplanet.com/centrifugal-juicers/ you'll see the first subheading I have put the heading, hit enter to the next line and entered the ad code, then hit enter to start the next paragraph. The result is that the text is too close to the ad. So under the next subheading I have hit enter twice to put an extra space between the ad and the text, but the result is a big wide gap which doesn't look good either. I'm sure it is complicated, but is there any way I can get a nice even space above and below the ad so that the ad flows nicely with the text? Unfortunately I cannot change the dimensions of the ad itself which would make life easier I am sure, but maybe there is some sort of CSS code to increase the padding under the ad unit to make it even? Hope you can help. Thanks, Sarah :)