You may want to cover the first chamber of bio balls with a floss to trap waste debris before they have a chance to settle on the bio balls. This would help avoid excess accumilation on the bio balls as well as other areas in the sump. If you feel the need to have to rinse any of the bio media, do so in used tank water so the bio isn't compromised. The first media water going into the filter should be a mechanical media (floss and sponges), then chemical, if any, like carbon, then biological such as bio balls and ceramic rings and the refuge. This order of media will help achieve more effective filtration.
It's best to prevent a crash than to treat one and they key here is to keep nitrates under control. 05 ppm
in reef. The best approach in keeping nitrates under control is to avoid over feeding and over crowding. That's where the waste originates from to begin with and an ounce of prevention is certainly worth a pound of cure. Especially in this hobby.
A sump set up is one of the easier and more effective filtration units to run maintain.
We, as a people, know so much more about outer space than we do about our own oceans. This lack of knowledge can very well spell the dangers that lay in wait for us.
The oceans surely would swallow us before a rock comes down to smite the planet of it's life.