No I had an external pump that was used for fountains of all things. I was hoping to use that to imitate a needlewheel impeller however, what I didn’t realize was it could never work. When I took them (the pump and the protein skimmer) to my fluids prof he pointed out the fact that the velocity would be reduced right off the head of the pump due to the expansion of the pipe. Not only that but the large volume of the canister would prevent any swirling motion from that small of a feed. So I got shot down once more and told I was an idiot for even thing such things might work. (he likes me I feel it deep down)