Aquascape Help

[Cstar_BC]

I can not for the life of me understand how people are building these effortless structures. I am having zero success with Aquaweld. I have an eel I would like to build a tank around so my plan is to have some pvc pipes as the base/labyrinth and then have a more open structure above for the corals and fish.

How are you getting your rocks to stick together????

Some of the reef forums recommend an epoxy they use for archeological specimens but its super expensive to order from the US and Ive now invested so much I dont want to chance that not working either.