I bought a new fish today, he was a "special needs" butterfly with only one eye. However, I got him home and set up the q-tank, and the little filter that i usually use isn't working. It is 11pm at night, and I won't be able to get a new one until tomorrow. Is it better to just leave the tank with no filter, or should I take the filter from the set up main tank and leave that one filterless for the night. I am worried about this poor butterfly won't last without one. Thanks for the help!