Purifier null of appreciation fish service water

摘要

PURPOSE: To provide a cleaning apparatus effective for promoting the proliferation of aerobic bacteria and preventing the lowering of pH with time. ;CONSTITUTION: This cleaning apparatus is composed of a 1st filtration vessel 10 containing a biological filtration material and a 2nd filtration vessel 20 containing a biological filtration material and connected to the draining side of the 1st filtration vessel through a pipe 3. A pump 16 is placed at the side of the 1st filtration vessel and an apparatus 30 for introducing air into the 2nd filtration vessel is attached to the water-intake port of the 2nd filtration vessel.;COPYRIGHT: (C)1995,JPO