Choosing an Automatic Feeder


Reefing newb
Good Morning All :)

I will be away from home for about a week and am making preparations for my tank to sustain itself while I am away.

My RODI filter is connected to a water supply and then to a float in the sump, so maintaining my water level will be covered. I also have a battery backup on the system which will run the tank for 36 hours in the event of a power failure.

Feeding is another issue. I have an automatic feeder, but flake food floats on the top and gets sucked into the filter before the fish have an opportunity to eat. Obviously, I can't use frozen foods. Is there a dry food which can be loaded into a feeder that will sink so the fish have an opportunity to eat it?

Anything else I need to consider?

Thank you.