September 23, 2016
Air Stones Between Filter Media
A trick which “rookie” pond owners should adapt is, if they have air stones, one or some of them should be “positioned” between “biological” filter media (that is, if they also use “biological” filters). Doing so not only “improves” the circulation of oxygen (air stones, by their very nature, “do” increase the circulation of oxygen), but the “mixing” action of the water circulation by the air stones before it gets in contact with the media is also beneficial in that it helps stop muck from settling on the media.
It also obviously provides excellent oxygen circulation to the filter media’s “friendly” bacteria.