i was goign to get a sand sifter but i need something as small as a orange spotted or soemthign small, i only have a 26g bowfront, so it is rather tall and it is hard to get the flow that i'd like.
as far as the sterilizer leavign alone all the good bacteria, that is not true at all, they kill whatever is flowing through them. the UV light burns any organism. it also depends on the flow rate thorough it, a faster rate won't kill much but a slow rate good enough ti kill parasites will kill everything