hey i read that dragonets/blennys are har to keep because of copepod supply is small in nano tanks. now i was browsing on a pet store site and saw a meshed/nylon cloth refuge. description said it should hold in tiny micro and macro specimins and alow water and nutrients through.i would put it in the back of the tank or in the over flow of a starter tank. i was just wondering is there another way to raise copepods? does this sound like a good one?