Assertion: aquarium's water | /r/HasProperty | placed above the aquarium
Facets:
Source sentences:
text: As for Automatic Top Off Systems (ATO), there are many ways to do this from simple floats (like used in toilets reservoirs), the Hydor Smart Level and similar electronic ATO systems, or simple gravity fed ATO reservoirs that use a simple air line valve to control input of water placed above the aquarium,, often hidden and out of the way.