That would look stupid and eat too much FPS.
As Sepelio said, you should set it up in worldspawn. The description of the entity tells all the info you need.
"One should strive to achieve; not sit in bitter regret." WE ARE NEXUIZ.
first set up your particles, for this you need 2 emiters to do the water spray arch, then link them to a trigger_multiple and the downward part starts 2 seconds later.