These dang things don't come with any instructions! I am trying to hook a hose up to the front/output of my Topfin Powerhead 50 submersible pump, but unlike more simple pumps I have used in the past, the intake seems to shut off? How do I get it to pump water up into my tubing?
And secondly!.. What is the clear tubing with the pincher valvy looking thing on the top for?
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