when dealing whit the prop, you gust flip the impeller around as it is showing on the youtube video,
the white prop gust popsoff and turn it around, than you eliminate the posebilety that it spins backwards.
the flow thy guy is mentioning of 3000 g/h could shure be right, it is masive. and gust at the time I was considdering 2 tunze pumps, I think I think again -- it is not altering the curent, but the flow is there
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