Rockwork on tank walls

[Orcinus]

I cyrrently have a 8 gallon reef with some softies,lps, hardy sps and 2 BTAs . My goal is to move everything to a 43 gallon and use the 8 gallon for something else. At first I wanted to put more BTAs in there, and a small percula to host them. But now, after browsing a little, I stumbled upon tanks that have rockwork on the sides, with corals growing all over. It looked so amazing that I can't stop thinking about it. I want to try to replicate that in my small 8 gallon, or get another tank if needed. My question is, how can I safely attack the rocks to the sides? And will a taller tank look better with this type of aquascape or will the longish 8 gallon I have suffice?
Here are some pics for reference:

 

[fishguy242]

hi,i think can be done in any size tank, just make sure all is stable and secure...

 

[Orcinus]

Thanks

 

[SweetSaltyTank_J.G.]

Yes! Great idea. I just did the same with a wall of rock to hide my mp10 on the left side of my nuvo 10. And I did something similar on the opposite wall. Came out ok, I’m thinking of adding more to the back….

 

[NowGlazeIT]

Yea they look great! Front and top view only, unless you don’t fill up the sides completely.