The plugs would not fall down.
It will hold the plugs, the coral might fall off if your gluing skill is not "pro"; if its glue correctly, it will stay.
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Aqua Japan Reef Pro 90
36x24x24
rimless tank
1/2" thick
3 sides starfire
corner overflow
pre-drill 1.5" drain and 3/4" return
31" Black Stand
28" sump
Check your local store or ask them to order for you.
Comes in Black Color
Black Color
Small Unit - MAP: $19.99
Hold 8 regular plugs
4.60″ long x 3″ wide
Large Unit - MAP: $29.99
7.75" long x 3" wide
Large hold up to 14 plugs
Up to 1/2″ thick magnetic