[Pennypacker]

As far as wash media is concerned, have you tried sea sponges? They're excellent! They're pricey, but they last a really long time (at least mine do). They also release dirt very, very well. The only important thing to remember is to give it a good rinse when you first get it to wash out sand and stuff. After that, you're good to go.

You can find really nice ones at Top of the Line. Giant Sea Sponge