The pinwheel is just push fit with a little krazy glue, just drill out the center with a bit just a little smaller than the powerhead shaft your going to use. If you can find the larger "blue" bioballs it's way easier as they have a hole in the center and they fit a little closer to the outside of the housing. I can't find tham in Edmonton (unless i want a huge box), that's way i used the black ones.
Clinton
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