Please critique

[reefing is my hobby]

My tank is a 180-gallon tank in it you will see how I am planning on doing my proposed aquascape. I am working with 140lbs of dry rock from ARC Reef. Their rock is from the same resource as Marco Rocks from what I have been told what I like about ARC Reef's rock is that ARC Reef pre drills their rocks for frag plugs. The goals that I had in mind when setting this up was for flow behind the rocks so I purposely left space behind them for future powerheads and to give me three different levels of coral placement 6-8" shelve from the top, a 12-15" shelve from the top, and sand bottom placement. I also wanted either some tunnels and/or caves for interesting swimming patterns and stress-reducing places for rest for the fish.
I plan on using a sand bottom because I am looking to stock the tank with community capable wrasses and gobies. As far as my coral stocking plans will be determined by what par levels I get out of 4 Kessil a360x and t5's and flow level but I am hoping that it will be capable of both SPS and LPS corals which is why I strived for 3 major levels of rock shelves and center of rock placement for ease of flow designs. The powerheads in the picture aren't permanent mounted as far as being tie-wrapped because I want to see the flow I get when I add water.
Even though I like to think that I did a lot of planning this out, I really would like some feedback before I epoxy/cement form my peers see where the flaws are in my design. So looking forward to your comments. Thank you

 

[JoshO]

I love it, great set up! Only thing I'd change is the small left island, maybe make it slope down towards the left hand side of the aquarium!

 

[Murica]

I like the aquascape. I'm a huge bare bottom advocate so, that would be the only thing i would change. Sand can have its benefits, however.

 

[Braves Fan]

I am the worst at Aqua Scaping I like corals and I want my scape to be as coral friendly as I can make it ,,, I want to be able to place the maximum amount of corals in the tank as I can I think I have a good grasp on how to make it happen it not easy ,, takes time and work ,, disclaimer I have a man made scape in my tank lol

Vertical is your enemy ,, you want a slope to the scape ,, will allow you to step down your coral frags on your scape from back to front of the scape ,, the more front to back depth you have in your tank the better ,, the bigger rock you use in the scape ,, if you don't have a lot of space in a ,, say 24" front to back tank ,, is your enemy ,, use smaller rock that will allow you to not have as much vertical ,, vertical to me ,, is dead space when it comes to placing corals ,, most likely won't get the light they need to grow ,, do your upmost to not have vertical ,, using smaller rock will help with this ,, bust bigger pieces up and use a epoxy to create the scape you want ,, don't get in a hurry ,, it takes time ,, give it the time ,, create what you like ,,

Corals will grow on the horizontal and a bit down the vertical ,, you want to limit the amount of vertical under where the corals will grow down to the next horizontal ,, I would also suggest you lower the scape ,, in the pictures ,, your scape seems to be at power head height ,, this might cause a direct flow on your corals ,, my advice ,, take the biggest rocks you have ,, bust them in half ,, start over ,,

 

[lavoisier]

I would consider angling both structures.

 

[Jose A Venereo]

You should leave more space between the glass and the rock. IMO between 4"-6". The layout is nice, but, as mentioned on previous comment. Consider sloping rather than vertical surfaces.