Where is the WILMA mixing pump? (need help quick)

So everyone says, including the awful instructions, to open the tap and mix the solution. What does this shit even mean? There is the water pump, you connect it to the hose where the drippers are connected. On that hose there is a turn tap. On one position it feeds slowly. On the other, it feeds fast. It literally just controls how fast the water feeds through the dripper.

What are you supposed to actually do to mix the nutes?

You use a bucket, mix your nutrients, ph it and pour it in the res ready mixed, then you top up the same way.
If you need to adjust your ph of the res then just use anything to stir it or top up with higher/lower ph to level it out to where you want.

You sure it says tap and not tab?

Buy an extra water pump or an air pump and air stones to keep it well mixed and oxygenated.