Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
If it is clean, not dusty/muddy, you could just dump it in, but I prefer putting these sorts of things in bags so it is easier to remove for cleaning. A mesh bag makes it much easier to lift it all out, plunge it into a 5 gallon bucket to rinse it, then return it to the sump.
While it is out of the sump, good opportunity to clean the sump.
I find it frustrating to have to pick out each bit by hand for cleaning.