looping an effect

hello-
I'm trying out particulars and am trying to loop a composition.

It's just an effect of aquarium bubbles growing from the bottom of the tank and floating up.

However, since there aren't any keyframes, I can't use expressions to loop.

I'm sure I'm missing something basic in After Effects but I wanted to post here since I'm utilizing Particulars.

My comp is 3 seconds 10 frames long and I just want the emitter to keep emitting, or to just loop.

Thanks

Hi
use the following time remapping expression to loop the comp:

time % source.duration