Fig. 6 in Technological Aspects Of Keeping Dytiscus Latissimus Linnaeus, 1758 (Coleoptera: Dytiscidae) In Laboratory Conditions

Fig. 6. Principles of water filtration and circulation in an aqua system. A- aquarium; В- sump and biological filter: 1.- Overflow pipes for drainage; 2 – initial rough cleaning filter; 3-4 further thorough cleaning filter; 5- reverse pump; 6- carbon filters; 7 - UV lamp; 8- freezer; 9- PVC pipes of water supply 10 – water rap; 11- Air pump; 12,13 – air supply sprays; 14 – drainage and reserve drainage system; 15- central water supply system regulated by a float valve.