Yes, you certainly can. It's as easy as turning on the light or a pump. 

During a Filter cycle, if an accessory (a pump, the blower, or the light) is used manually, the Filter cycle is suspended during the time the accessory is used. Once all accessories are turned off (whether manually or by the built-in timer), the Filter cycle remains suspended for an extra 40 minutes, then will resume automatically. 

When a Filter cycle is suspended, the Filter cycle icon will blink as a reminder.