The fish only or reef aquarium has a number of devices designed to help maintain the correct parameters, hopefully ensuring healthy livestock with a long life. These are heaters, water level controllers, calcium reactors, lighting controllers etc.
All of these devices service a particular area. For an obvious example, heaters maintain temperature. The action of these devices is appreciated by the aquarist as the action is usually obvious. There is one device though which sometimes causes doubt, and that is the protein skimmer.Read more →