Improved Replacement Impeller for Top Fin PowerHead 30

The Top Fin PowerHead 30 is an inexpensive (cheaply made), pump to move aquarium water. I purchased two of these things and even when they were new, they were not very impressive. After a month or so, they quit working completely.

I took them apart to find that the impeller had broken. Worse yet, it seemed that the thing had been designed to work poorly. Maybe they didn't want to outshine the next model up or something.

So I redesigned the impeller. The original one was tiny and only