Gorgeous tank, stand and hood! :y220e:
Lots of rock work for your Mbuna – they will love that. Just from an atheistic stand point, all the rocks on the right look to be about the same size and shape. I’d mix in some different sizes and shapes. I am a closet geologist and enjoy looking for interesting rocks - most major cities have several stone companies with bin after bin of every rock imaginable and every shape and size too. Not a big deal though, just personal taste.
As mentioned, a little bit of silicone is a good idea (you don’t have to silicone all of the rocks together – maybe several groupings). That will also help when you decide to do major maintenance and pull rocks out to vacuum).
Back painted black – I like. FX5 & AC110 – I like.
Looks like a big tank: a 125 or a 180??? Is it all brand spanking new?
Overall, a very sweet setup, congrats, you must be very excited.