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  2. Aquarium filter - Wikipedia

    en.wikipedia.org/wiki/Aquarium_filter

    A large shower biological filter designed to maximize the beneficial effects of the nitrogen cycle, in a koi pond. Proper management of the nitrogen cycle is a vital element of a successful aquarium.

  3. Rolf C. Hagen Group - Wikipedia

    en.wikipedia.org/wiki/Rolf_C._Hagen_Group

    Rolf C. Hagen began acquiring bird seeds from the prairies in Western Canada with the intention of exporting them back to Germany, where he had established contacts. This was the initial stage of his new venture before expanding his business into a diverse pet supplies manufacturer.

  4. Water heating - Wikipedia

    en.wikipedia.org/wiki/Water_heating

    In traditional plumbing in the UK, the space-heating boiler is set up to heat a separate hot water cylinder or water heater for potable hot water. Such water heaters are often fitted with an auxiliary electrical immersion heater for use if the boiler is out of action for a time. Heat from the space-heating boiler is transferred to the water ...

  5. Heating system - Wikipedia

    en.wikipedia.org/wiki/Heating_system

    A heating system is a mechanism for maintaining temperatures at an acceptable level; by using thermal energy within a home, office, or other dwelling. Typically, these systems are a crucial part of an HVAC (Heating, Ventilation, and Air Conditioning) system.

  6. Factory service manual - Wikipedia

    en.wikipedia.org/wiki/Factory_service_manual

    Factory service manuals (FSM) are the manuals provided by manufacturers which cover the servicing, maintenance, and repair of their products. They are not designed for the general public, however they are created by manufacturers for use at their OEM dealerships.

  7. Aquarium - Wikipedia

    en.wikipedia.org/wiki/Aquarium

    Aquarium heaters combine a heating element with a thermostat, allowing the aquarist to regulate water temperature at a level above that of the surrounding air, whereas coolers and chillers (refrigeration devices) are for use anywhere, such as cold water aquaria, where the ambient room temperature is above the desired tank temperature. [47]

  8. 21 Of The Funniest Tweets About Cats And Dogs This Week (Jan ...

    www.aol.com/21-funniest-tweets-cats-dogs...

    Woof — it’s been a looooooong week. If you feel like you’ve been working like a dog, let us offer you the internet equivalent of a big pile of catnip: hilarious tweets about pets.

  9. Oil heater - Wikipedia

    en.wikipedia.org/wiki/Oil_heater

    An oil heater, also known as an oil-filled heater, oil-filled radiator, or column heater, is a common form of convection heater used in domestic heating. Although filled with oil , it is electrically heated and does not involve burning any oil fuel ; the oil is used as a heat reservoir (buffer).