i just set mine up today. my mantis was an unexpected guest.
im not sure im going to keep him, but i fashioned a make shift home until i decide.
i used a piece of 1/4 tubing (keep in mind this is a temp. home) to syphen water into the 2.5g from my display.
i drilled a hole in the side of the 2.5g and added a couple standard fittings.
water constantly syphen's from my display to the 2.5 and overflow's to the sump.
in the event of a power outage, the syphen will stop, but i'll have to manually restart it. for this reason i've added a red sea nano filter to circulate water in the 2.5. 1 27watt 6500k bulb completed the set up
low tech as it gets

if i decide to keep him, i'll add a wier type overflow so i dont have to worry about starting the syphen in the event of an power outage.
having no experiance with the mantis shrimp, i'm hoping this will be a good home. open to suggestions to make my mantis happier though

guess which rock he's hiding under??????