As far as feeding was concerned silversides,krill, clams chunks or raw shrimp from the grocery store would work anything meaty and some tongs until you feel comfortable or drunk enough to feed him by hand. I had mine for about six years I bought him from ATM in Vegas transferred him home to...
I have two colonies both about the size of cantaloupe that need to be trimmed back and if anybody wants him it's free for the taking
My cardinals love hiding in it and it gives a good natural look to the tank without being invasive