DIY aquarium background

i want to make a expanding foam back ground and i want to know what kind of foam is aquarium safe.

 

+1k......bump.........good question...Ive seen it done in fw tanks but not sw is sw ok? the fw way oof making these are they say any foam is ok as long as you set it up and let it cure.....also are you supposed to civer the back with concrete too?

 

Ive seen many saltwater rock walls with foam in them, but im not sure on which foam they use!

 

yea i ive seen them in fw and they look pretty cool.
http://www.youtube.com/watch?v=BrSdYK5El_8
i want to make mine like this but rougher like lr

 

just FYI, I use an aquarium safe expandable foam in my pond. You may want to check it out. It black foam though, if that matters. Go to Lowes hardware and look outside where the pond liners and pumps and waterfalls are. I thinks it's called pond sealant.

 

ok thanks
are there and other colors like white cause im going to sprinkle sand and put chunks of lr in it

 

Not that I recall, but I could be wrong.

 

oh ok
imma try it
thanks blue falcon

 

Good Stuff foam.

 

i got a few links for u

http://www.3reef.com/forums/i-made/foamback-reef-tank-57314.html

http://www.3reef.com/forums/i-made/foamback-reef-tank-57314-2.html