Those will look great!
Here's a ricordea island I made (photo is a bit out of date, and blurry top-down with a pump still on) by gluing together some different rocks and frag plugs, it curves around the base of the main rock.
Here's a ricordea island I made (photo is a bit out of date, and blurry top-down with a pump still on) by gluing together some different rocks and frag plugs, it curves around the base of the main rock.