Hey bailey Welcome!
You can press wood, rock, bark or whatever into the GS foam while it's wet to add a good look to it as well.
You simply smear the silicone all over the GS after it dries. A paint brush will not work, silicones too thick. get a 10 pack of cheapo disposable gloves and use your fingers to spread it on thick, and I mean thick..don't be shy with it because you will miss spots. I have seen some people take a hacksaw blade and carve the top of the GS before applying the silicone to make it adhere better... I thinnk I am gonna try this.
I am just getting to this stage on my 44 hex build. I practiced on a 10 gal first. I would recommend you waste a can of foam on a piece of cardboard, learning how to adjust the flow rate as this gives you different amounts of expansion, then you can use it for a dry run on silicone and coco/gravel/moss/ or what ever you desire.
you should tag along my build thread because I am doing a real Step by Step start to finish.
Hope that helps bro.
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