DIY Spray foam waterfall?

[maddmax]

Well i am looking into changing up my setup a little bit. I'm thinking on putting in a diy spray foam land section in my tank with a waterfall (which would be my return from my sump). Has anyone got any pointers? I am very tempted to do the whole land section in 2 pieces,I have never really dealt with spray foam for backgrounds...
well here is what i have at this point

This is kind of what I'm thinking

found here
http://www.lizard-landscapes.com/how-to-build-a-waterfall.html

 

[alexanian]

It's pretty easy I built a beta tank with a waterfall and it worked well. It's in my signature if u wanna check it out. Sealing it is a bit tricky but with the right materials it can be done. I used a little white cement with the grout and it seemed to hold a bit better

 

[maddmax]

what did you use to paint/seal it? great job also

 

[alexanian]

Thnx max. I painted it with acrylic paint, but i can't help u with the seal cuz all I know is that it is some kind of acrylic lacquer they use for making fake stones on fountains down here and I put some silicone on top of it with my fingers. It's the best thing I could find here but u'll have many other better options to choose from.