I've used the type you're considering and still use some. I like the fact that one can thoroughly clean one of the foam pieces and not risk destroying the beneficial bacteria colony. But, on the negative side, I've had the perforated plastic pieces that the foam sleeve goes over tends to embrittle over time so they break off. Good design concept, IMO, but over time they break and need to be replaced. I agree with Ron in that the ASI types with the larger diameter uplift tubes are the most efficient and effective foam filters on the market.