Recently bought one of these and it's a lot smaller than I expected, and that tube is daunting. I'm really really not comfortable with the idea that they could just drop from the top of it to the bottom.
I've moved them back to their old cage until I can carpet the bars on the top layer and hopefully find a solution to the vertical drop!
Has anyone got this cage and managed to create another way up, instead of the tube. Maybe some kind of ladder thing?
Rant about the tube: it just seems like a stupid idea, being vertical like that and with gerbils how they kick the sawdust etc. Blocking their access. As good as the idea seems, it also seems bloody stupid. I'm kicking myself for buying it. It might be great so if anyone can say good things about it I'd be happy to hear.
I'm considering just using it as some kind of playpen thing for them or something, though it seems a wee bit small even for that!