Hi, im andrew and i may convert from FW to SW but i was curious about costs, you see i have numerous 6 gals, 10 gal, 20 gal and a 65 gal (but thats my FW tank and will always be unless you can convince my parents otherwise) and i was wondering about Mantis shrimp, but is there any special requirements to salt water (i.e. do i need a UV steriliser or a skimmer?) it will be my first attempt at SW and the mantis i am looking at is either a peacock or orange spot any advice?