| Water changes |
the removal and replacement of old aquarium water with
new |
| |
|
| Water chemistry |
the measurement and evaluation of water parameters, or the present
state of those parameters |
| |
|
| Water quality |
the overall suitability of an aquarium's water for the organisms
exhibited therein |
| |
|
| Water softener |
any device or medium for reducing hardness, or the concentration
of dissolved carbonates of calcium and magnesium in fresh water |
| |
|
| Wavemaker |
an electrical device that enables timed switching of power between
two or more pumps, with the aim of creating changing currents |
| |
|
| Weber's apparatus |
an anatomical structure found in characins and related fish that
connects the auditory organs with the swim bladder, which, in turn,
operates as a sounding board, giving the fish an especially keen sense
of hearing |
| |
|
| Wet/dry filter |
any device for enhancing bacterial nitrification in which the medium
upon which bacteria attach is not submerged, but rather moistened
by water pumped over or through it |
| |
|
| White band disease |
a pathogenic condition of stony corals in which an area of dying
tissue is preceded by a distinctive pale ring |
| |
|
| Wrasse |
any of the numerous species in the marine fish Family Labridae,
with elongate body and large canine teeth |
