I recently put a larger ATO reservoir in my stand and replaced my Tunze ATO with the Neptune ATK, but I need a way to transfer water from 2.5 gallon containers to the reservoir. The reservoir has a small 4" diameter opening for filling. The Tunze ATO pump fits inside my 2.5 gallon containers. Is there a power cable that can be wired direct to the pump to operate it directly without the Tunze ATO "brains".