Get a prefilter, or use a sponge.
http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4136+14687&pcatid=14687
Your LFS should have some that are cheaper.
http://www.drsfostersmith.com/product/prod_display.cfm?c=3578+4136+14687&pcatid=14687
Your LFS should have some that are cheaper.