hang on back filter
Small, motor-driven, type of external filter that literally hangs over the edge of the aquarium. Unsuitable for larger aquaria and often abbreviated to HOB or HOT (hang on tank).
Ichthyological terms, not general ones.
Small, motor-driven, type of external filter that literally hangs over the edge of the aquarium. Unsuitable for larger aquaria and often abbreviated to HOB or HOT (hang on tank).