Here is some pics of the Background i made for Scat (Craig) 
Same method as the other one
Cut poly to size of tank and build the shape with pieces of poly
Go over with spray foam and use a wood rasp to shape when dry u can use an angle grinder with a sanding attachment if you wish
NOW melt away the areas you want to be hollow with a blowtorch
Render with your light base color
Keep adding your render until you get the desired affect
Cut to size to fit in tank openings
Spray with pond sealer
silicone to back of tank
render up joins
seal joins with pond sealer
leave for 7 days before filling with water
Regards Cobby
1 response so far ↓
1 Jim // Apr 5, 2008 at 8:23 pm
I love the idea of what you have done. Im interesting in makeing branches or root section to cover over the undergravel filter lift tubes, and perhaps create logs that hide hoses and air tubes to allow bubble up.
There is a substance called “oomoo” that can be used to make copies of wooden branches, rocks, etc, and allow pouring resin inside the molds. Have to get the materials, and find some branches and stones to make casts of.
The idea is to keep the corners looking natural
l and hide the lift tubes and air stones.
Jim
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