I used a sheet of acrylic from Home Depot painted it blue (light at top dark at bottom) and used velcro to hold it to the tank.
It pulls right off for cleaning the back and is still translucent and it kind of glows with light behind it and gives a real deep water look.
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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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