Mine is based on two peaks with a canyon that runs to the back wall. Inspired by Palletta's book and the amazing Oregonreef.com. I have 36" front to back to help. Caves and overhangs were built using the pvc support. If you can get ahold of Vol. 3 of The Reef Aquarium there is a great chapter on backgrounds and aquascaping using alternative methods.
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Brian
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220g inwall 48"x36"x30"
110g mangrove refug/sump
Poison Dart Frog Vivarium
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