I've finally got the 40 gallon topper on my 75 gallon tank but I dunno. It feels very crowded. I'm sure it has to do with the fact that my huge crabs need huge shells and water bowls and that those take up a lot of space. (I also added one more medium sized crab named Coconut, hence the smaller shells).
The pics aren't the greatest but it's what I've got right now. I think I'm going to add a daytime bulb for viewing because the reflections are so bad.



