) so I couldn't drop my water level enough for the cana girls to lay comfortably. I came up with this solution--borrowing some from another member--to make it big enough for my cana girls. My hubby Ray replaced the glass on the back part of the tank cover with plexiglass and cut a big hole in it at the back. I put a Gladware bin over the hole. The light holds the front down and he added a ledge at the back to let the girls rest if necessary. There is also a big rock on top to hold it in place and it's glued to the plexi. Here are the pics to make it easier to understand:This is the view from the left side of the tank. The plexiglass is on the back part with the light on top. You can see the hole under the Gladware bin and the little shelf in the back:
This is from the right side of the tank:
This is the back of the tank. Don't worry about those white bars, they're the stair balistrades
. You can pretty clearly see how the bin is bigger than the hole so there is a piece of plexiglass shelf underneath it. It's glued on but the snails are so heavy that I also have a wooden ruler under the shelf for support:
This is the front view--you can see the stairs in back. The laying bin is behind the light. Those other two bins in front are nursery bins. There are baby spixies and diffusas in them. As you can see, one cana and one diffusa female have already used the bin to lay their eggs!
Close up of the front bin. The bright red eggs on the left are the cana's and the paler pink ones on the right are the diffusa's:
I hope this can help someone else who can't drop their water line enough. Spoiled snailies!
(Good thing you told me about the stair rungs---I thought they were the bars to Ray's cage. 
. We always called them "barreaux". Some of my mother's french slang that sticks in my head