These are the best way I have found for mounting corals onto egg crate to grow out. These are 3d printed tapered mounts that fit egg crate perfectly. On top of the printed mount is a 3/8 stem to install 3/8 tubing cut to what ever height you want. Then the corals plug is installed into the tube. This allows you to vary the height of your corals as they grow or if you feel they need more light. Another benefit is you can keep more corals in the available space over using tiles. They can be printed in custom colors but right now we are doing white and black. If your interested in these they are .75 cents per piece. Shipping is $8 unless you purchase $75 worth.