what kind of heater are you talking about? because you should not get a water heater, and at most a slightly warmer end heated only by a low wattage daylight bulb at one end would be max. dont use a heat bulb, that will maek it too hot, use a regularly shaped daylight bulb, usually light blue in color of the actual glass on the bulb. i dont know what kind of a pull the shark filter has, so it may be enough to grab and hold the newt under. in general i owuld say add the newt, but im ot sure with this filter. i guess you could try it and keep a close eye on it, maybe even putting him on it to see if it will hold him down. it sounds kind of mean, but he will eventually get to the filter anyways, it might as well be when you are there to turn the filter off if need be.