Go to your Eyecandy 4000 Smoke filter and use these settings..

if you click the color tab you can change what color your smoke is to suit your needs

Now you want to go back and do the smoke on the next layers, 

just click the random seed box on each layer...click ok.

Now for the "slime" 

For this you will need to go to the top layer and highlight the area you want to have slime on...

right click and choose "promote selection to layer", grab your brush and paint into the selection.. make it the color within the cauldron, I made mine red..looks kinda like so. 

unselect the image..and duplicate that four times.

Now for the movement...we will be using Eyecandy Melt with the following settings.

You can make these lines thicker or longer by adjusting the width and length...click ok.

Do this on each layer and hit random seed on each layer before choosing ok.

Now, we move on to the bubbles in the melted layers. For this we will be using eyecandy 4000 Water Drops.

this will be going onto the melted section we just did.

this will be the settings you use

you can choose what ever color you need to fit your needs.

You want to apply this to each melted layer you have but hit random seed before clicking ok.

Now merge the melted layers on to the cauldron layers...

take it into you animation shop save it and you are done.

I hope you enjoyed this tut.

Now, go make some cool looking cauldrons!