I suggest using icons that communicate the nature of the alert, rather than the marathon logo.
I would divide these alerts into the following categories: success, warning, informational, or error.
For example, here is what a "Not Scaling" alert, which I consider an error alert, might look like: http://cl.ly/image/3M0h3A2i2o0c
The word "error", icon and red color clearly communicates to the user that something has gone wrong.
For "Delay reset succesfully" we will want a different icon — something green and with a checkmark for — to communicate to the user that everything went as planned. And so on.
For background, see https://github.com/mesosphere/marathon-ui/pull/154#issuecomment-134668257