Hur pålitlig är den här lösningen? Några do´s and dont´s? Level Control Mechanical level control for refilling evaporated water The mechanical level control is a compact unit used to automatically refill aquariums or filter systems after loss of water due to evaporation. It can be connected to storage vessels that are placed higher than the aquarium or filter; this creates a free flowing water top up system. The unit should not be used with pressure lines or the tap. Level controllers can be connected in parallel, so that aquariums units with many tanks can be safely supplied with water.