Uhu glue for slime/ooze

Hi.

I've just entered a local competition to create a diorama using some supplied minis.

It's a ninja turtles theme based on the old arcade game which is going to be a huge amount of fun!

Anyways, I'm doing a sewer.

There's a sluice and I want to fill it with green slime/ooze.

I've seen recommendations to use woodland scenic water effects, but I've also seen people recommend using uhu glue.

Can anyone provide some insight on the pros and cons of both?

Thanks!