my equipment is coming to the end of its life cycle. i am looking for replacement equipment and the filter (ocean clear) is no longer available. most of the new filters are all called pressure filters. perhaps i am doing things wrong but the logic seems great. i don't want to spend much time in the pond cleaning anything, so the pump and filter is all outside of the pond. everything is hard pvc piped. water is sucked thru the filter by the pump. this keeps all debris from traveling thru the pump - works great. just worried that the new pressure filters might not work as well. anybody out there have a setup like mine? any recommendations?