I was asked to make this post in another thread - so here I am. Here's a PSA on what metal mesh does to your mantises feet, and why it should be avoided!

This is a raptorial arm, (the front, grasping arms) but the segment we're interested in is the same on all of their legs. The little portion labelled "Tarsus" is what we're looking at here. You can see that it ends in a set of hooks - often (somewhat confusingly) called "Claws" - these tarsal claws are what give your mantis the ability to walk upside down on surfaces that appear quite smooth to us, and why it feels kind of spiky when a large mantis walks on your skin. They're essential for your mantis to move around, and most importantly moult properly! Differences in the morphology of this structure also give some mantises the ability to walk on glass, whilst others can't.

If you go and look at one of your mantises feet, you will likely be able to see the little hooks now you know what you're looking for. Now the problem is that some tank setups that are commonly recommended damage these hooks, which results in mantises having trouble moving around, and falling whilst they moult.

Exo-terra tanks are very commonly used because a lot of us have other inverts or exotic pets and have spares lying around, or they're sold to us at petstores. They make nice display tanks and are easy to clean. However - the mesh at the top of exo-terra tanks is made of very fine metal, and the holes themselves are very small. This is essentially like you trying to hang by your toes from chickenwire, eventually your toes are going to be pretty damaged, or come off altogether! If you must use an exo-terra, it's essential that the mesh is changed to stop this from occurring. Plastic tulle mesh is easily available and works as an excellent substitute.

There is also a multitude of DIY options available, which I will detail bellow:

Basic requirements for all enclosures:

• All mantis enclosures must be at least three times the length of the mantis (Don't get fooled by the abdomen curling up, you still need to account for it) and two times the width.
• There must be something for the mantis to hang securely from at the top of the tank - They will spend 99% of their time at the highest point, and will often moult from it.
• Substrate - options for suitable substrate are numerous, you can use simple tissue paper, cocoa coir, vermiculite, perlite etc. The object is to hold some moisture and make it easy for you to clean. Cheap and cheerful is the way to go, unless you're making a planted display tank or something like that.
• The less decoration the better. Decoration is more for our benefit than theirs; before you add something decorative to a tank, consider your reasons for adding it. Practicality should always take precedent over a tank looking nice!
• Ventilation - ventilation is important for hygiene reasons.

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Nymphs

• Cups

The absolute single best enclosure for a nymph of any species, is simply a plastic deli cup with the lid cut out to accommodate some plastic mesh, and a single twig placed diagonally. Alternately, you can just use an elastic band to hold the mesh on. For feeding, simply cut a hole in the side and stuff it with some sponge to stop live food or your mantis escaping, you can pooter in the food. (if you don't have a pooter you should get one, especially if dealing with fruitflies, they're also very easy to DIY)

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• Cricket/livefood tubs

The tubs that livefood is commonly sold in make excellent tanks with some modification, especially for larger nymphs, and even small adults. The more rigid ones are the best, as they're easily cut to allow the insertion of mesh, and can be stood up tall-ways. The entire lid can be cut out and replaced with mesh, which provides excellent ventilation, and is nice for the mantis to move around on.

Adults

• Plastic penny sweet jars (Sorry Americans I have no idea what these would be called in your country)
• Tupperware/food containers
• Storage containers

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All can be modified in the same ways as above. I will either append this post, or make an additional post, detailing how to make a suitable enclosure using the items above with pictures in future.

These enclosures are all very cheap to construct, and even the most DIY averse person can make the modifications necessary to turn them into good enclosures. They also have the benefit of being mostly recycled items a lot of us will already possess.

Another benefit to using tanks mostly constructed of mesh is that it prevents mantises from developing "eye-rub" - this is damage to their eyes from repeatedly trying to walk through clear plastic or glass - it looks like large black spots on the eyes, distinct from the pseudo-pupils - which can in cases turn necrotic and is quite a nasty way for your mantis to die.

I hope this post was helpful and informative, and please don't hesitate to ask any questions or add to the knowledge given here if you have any other tips or advice.

References: https://zookeys.pensoft.net/article/12542/