I was wondering how fast or how big will my female mantis get in my tank. I know there is no EXACT way of telling, but if anyone has a ballpark figure, that would be very helpful. I have a ~ 5 inch female Peacock in a 38 gallon tank. Right now she has an egg sac and I am waiting until they hatch so I can see her come out more often. Anyways, thanks for any info everyone. By the way, you can see pictures of her in my gallery.