One of my terrariums has become infested with tiny bugs, far to small for the neps to eat, a few end up as sundew food but they mostly go unchecked. If I were to put a Utricularia in there would it keep down the bugs population? Which one should I choose for Highland Nep. conditions? If that would not kill off the bugs would a pigmy sundew do it? I really don't want to use any kind of insecticide.