you have kept them? So is acrylic important? Did you do live foods or just frozen? I don't know if my skimmer works, i do have a huge filter system. but i have black sand which looks dirty anyway, i just thought the black and white stone would show it's colors better. anything different about keeping them than other reef critters?
acrylic is not really that important. yes, they can bust your tank, but only really when they get huge do they pose a threat to your glass aquarium, IMO. i fed him live food and frozen food. you can get live crawfish to feed him and that makes it easy to switch over to frozen foods too, if he doesnt already eat frozen. mine ate frozen silversides and krill mostly. what kind of filter system are you planning on running? and what kind of mantis? there are a lot of great sites on stomatopods on google to see which mantis is best for you. but since they are messy eaters, you might want to check out your skimmer and make sure it works, or get a nice used one from here.