Aquaponics System: How I built it. part 4

This is the most expensive part. My mommy bought it for my cause she loves me. It was 22 bucks at home depot. It pretty much makes the system. It is an outdoor digital timer it has 28 different settable time events. I have it set to come on in the morning and turn off every 2 hours for 30 minutes and turn off at night. It runs the 250 gph pump in the fish barrrel.