I bought one of these containers of food today to feed our fish while we're on holiday. It looks like cat food! But okay, hopefully they'll like it. Do I put it in the pond in its foil tin though, or do I push it out of the foil tin and just put the food itself in the pond? In the foil thing it floats 
Confused. I've used the hard, white block before, which just sat on the ledge and didn't float ...