How do you make a background?

[Whistly]

I've done about half of the foam. It said 250ml made 12l I think they were being rather optemistic lol. So I need to get some more. Once I've done all the foam I'm going to cover it in a layer of aquarium safe silicone.

How do I get substrate to stick to it after the silicone layer has dried.

[Kreamcheese]

I've done about half of the foam. It said 250ml made 12l I think they were being rather optemistic lol. So I need to get some more. Once I've done all the foam I'm going to cover it in a layer of aquarium safe silicone.

How do I get substrate to stick to it after the silicone layer has dried.

You apply substrate to the wet silicone, and press firmly. This way when the silicone dries it has the substrate stuck on it.

[Whistly]

You apply substrate to the wet silicone, and press firmly. This way when the silicone dries it has the substrate stuck on it.

Ok thanks