I finally caught thay bullfrog that ate my fish using a net. It took over 5 days with many attempts before i was successful. I relocated him 2 blocks away in a stream. I'd like to repel any other frogs from coming by (humanely). I've read lemon juice, coffee grounds and a few others. I thought I'd try coffee grounds but can't find info if I can use coffee grounds right out of the can or they've had to be used to brew coffee first. Any suggestions about grounds and also other repellents that have worked for you. thanks