What an awesome build. This tank would be perfect for me as a mangrove paludarium for anableps, archerfish, and mudskippers. I could grow awesome tall plants, bamboo, and even trees in that tank. Have an island paradise for small reptiles also. So many possibilities. I wouldn't even think about filling it to the top with water. It just needs 12 - 18" of water for the best plant growth.
Thx, but she's my wifeIm happy for you and your girlfriend!