CecilDraten In my experience the absolute best you'll get with construct on this matter is like they've already told you to:
make the player spawn the "water trail object" "every x seconds" on self(x,y) with a fade behavior. Remember to use dt time for better performance.
play with it, with enough water trails per cycle it will look pretty neat.
Understand in advance that games use graphic resources to represent reality. Specially with a game engine like construct, that is better suited for casual games =)