You need to find something 'meaty' worm, larva, etc...Bloodworms get expensive if used as a 'staple' food. Look into silversides too, these are just freshwater minnows that are clean and packaged for fish food. just take a minute to thaw them first.
For hiding spots- you can be simple with it and get a piece of PVC pipe and weigh it down, this will provide a safe retreat for your knife.
For hiding spots- you can be simple with it and get a piece of PVC pipe and weigh it down, this will provide a safe retreat for your knife.