I tried this code, in my css:
.page_heading {
display: none;
}
But what I got was disable breadcrumbs in all of them. How can just enable or disable the breadcrums in just one specific page. ¿?

Ty again.. xD

Try this:

.breadcrumb {
display: none;
}

on the page where you want to enable it add this in the TEXT editor (not VISUAL).

<style>
.breadcrumb {
display: block!important;
}</style>

I have more licences of wordpress themes and this aquatheme has with your knowledge the best thecnical support of all of them.. I am very gratefull for your work.

Ty friend

How can I show the breadcrumbs on the page I show all my post ?

No problem, please give me your URL again!

.blog .breadcrumb {
    display: block;
}

You mean you want full width blog, no sidebar?
Edit your index.php and replace:

twelve columns

with

sixteen columns

.breadcrumb {
display: none;
}

And in my page of my BLOG, to enable it I have just added in the Text editor what you have given to me:

<style>
.blog .breadcrumb {
display: block!important;
}</style>

and this too:

<style>
.blog .page_heading {
display: block!important;
}</style>

And It doesnt work..

With regards to use the full width blog, without sidebar I dont know where it is this index.php // Could you please send me a picture explain to me please..

Thanks a lot my friend

.breadcrumb {
display: none;
}
.blog .breadcrumb {
display: block!important;
}

Thank you friend