JBJ PRO-35 Professional Reaction 4-Stage Canister Filter & UV Sterilizer The JBJ PRO-35 PROFESSIONAL Reaction 4-Stage Canister Filter & UV Sterilizer utilizes mechanical, biological filtration, and a 3 Watt UV sterilizer for a balanced aquarium There is an energy efficient 24V DC pump with push button flow control. DC pumps are very energy efficient, and if you are using the filter with a smaller tank you may not want to run the pump at full speed features a push button siphon No need to pump air out of the filter to get it going.