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Bullfrogs generally have two filters equaling at least 100 sq. ft. which is plenty. I have not seen the new model for 2014/2015 but they have always had an issue with the dead space behind the jet pack where algae and debri can easily gain a foothold if they are not properly maintained and it is not the funnest job to pull the jet packs and scrub the pipes. Remember, filtration is only as good as the maintenance person.