Pictures or the Doc Bio Filter are attached. These may also be found at any time from my signature link.
The Doc filter uses 1/2" irrigation tubing cut about 1 1/2" long and there are about 7000 of them. The overflow goes down a cascading water and its peformance is superior to anything I have ever used in my almost 42 years of ponding. These tubes will never clogg and will backflush without any problems since they do not retain water or the impurities that some of the other medias do.
The output water is as clear as bottled drinking water and this filter will take a pea soup pond to clear in 48 hours after installation.
Link to filter: http://drdaveskoi.tripod.com/html/doc_bio_filter.html
The Doc filter uses 1/2" irrigation tubing cut about 1 1/2" long and there are about 7000 of them. The overflow goes down a cascading water and its peformance is superior to anything I have ever used in my almost 42 years of ponding. These tubes will never clogg and will backflush without any problems since they do not retain water or the impurities that some of the other medias do.
The output water is as clear as bottled drinking water and this filter will take a pea soup pond to clear in 48 hours after installation.
Link to filter: http://drdaveskoi.tripod.com/html/doc_bio_filter.html