All the sudden my dwarf puffer has refused to eat frozen blood worms. He used to greedily eat them off of a tweezer. The only thing he will eat now is live brine shrimp. He has long decimated my pest snail population. Problem with the brine shrimp is only place that sells them is 30 min away and also heard that brine shrimp are not nutritious enough as only food source. Any other suggestions for my picky guy and how hard is it to set up a brine shrimp tank