he EHEIM skim350, although designed for constant use is also suitable for short term use. If using alternately in several aquariums, please make sure that algae spores or diseases are not transmitted from one to the other.The bacteria and dirt particles which are sucked in are collected in the filter sponge. This should be simply taken out and thoroughly cleaned after each use. Removes surface films and microorganisms from the water surface Promotes therefore proper gas exchange For both long term and temporary usage Quick installation - easy to fix to the pane via suction cups Only 5 Watt power consumption