. Looks better, easyier to clean, depends on the fish thow what the like more thow. One easy way to combat sand in filters. Is to just stuff a sponge on the intake. Those allso make these for different size intake tubes check out the link http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578+3579+21426&pcatid=21426Ash;4867102; said:go for a darker brown/tan color, orangeish color... you can also go black... ?
I voted sand too... except I use teh color quartz =p