I have a 5.5' tall x 3.5' wide x 2.5' deep corner Viv I'm working on for my water dragon. I'm going to be adding a foam/grout background and a pond. I have 2 problems: 1. I need to find a way to install a ceramic light fixture in the middle, that is removable if needed, as well as my water heater and pump that will be hidden in the waterfall. 2. I want to install a drain coming out the front wall under the door so I can drain the pond. I can't have thing that I need to access regularly on the sides or the top because it's a tall corner Viv and it's going to be flush against the wall and I'm short. any advice is welcomed!