Organic pools bubble flow. How a natural pool is pumped with one airstone in 1/2 day..

David Pagan Butler, inventor of the Organic pools bubble flow circulation system, shows how different diameter pipes work as air-lift pumps.\r
Free pdf: \r
And have a look at the great variety of DIY Organic pools David has inspired: \r
You can buy Davids classic DIY film Make a Natural Swimming Pool:\r
vimeo.com/ondemand/organicpools