leaving for 3 days. what should I do.

so I'm leaving the city for 3 days and I was wondering if my fish would be OK without food for 3 days?

I have a 40 gal tank with a small clown a sixline wrasse and a chromis. I usually feed them frozen mysis once a day.

I also have a bta, some pulsing xenia, green star polyps, and candy cane coral.

I plan on putting the lights on a timer for about 8 hours a day. but don't have anyone to come feed them.

suggestions would be appreciated.