What size aquariums is the ProAir a60 suitable for?
For aquariums of approx. 40-120 liters.What is an air pump typically used for in an aquarium?
For additional oxygenation, surface movement, and the operation of air stones or air-powered filters/air lifters.Is the air volume of the a60 adjustable?
No. The a60 is designed as a compact basic model without air volume control.What is included in the scope of delivery?
Air pump, 2 m air hose, check valve, and air diffuser.How do I install the a60 correctly?
Cut the hose to size, insert the check valve into the hose (note the direction of flow), connect the diffuser and place it in the tank. Set up or hang the pump outside the aquarium in a stable position.Why do I need a check valve?
It prevents water from flowing back through the hose and damaging the pump in the event of a power failure or loss of pressure.The pump is louder than expected - what can I do?
Place it on a horizontal, preferably rough surface (to prevent it from wandering due to vibration) or hang it up. Also check that the hose/diffuser is connected correctly.Can the pump run without a hose/diffuser?
No. Running the pump idle can increase noise and lead to premature diaphragm wear.There is no air or too little air - what is the most common cause?
Air filters are often dirty, diffusers are clogged, or the diaphragm is defective. Clean/replace accordingly.How often should I service or check the pump?
Check the air filter regularly and clean/replace it if necessary, check the diaphragm if performance decreases or noise changes and replace it if necessary. 
Manual JBL ProAir a60