sup milton, is this going to be your first tank? if so, i suggest not getting your mantis for a while. first off, you can get your water quality perfect if you wait and you can get the hang of the hobby by just keeping fish. this will also help by introducing the mantis after having your fish for a while. there are just many factors and things that can go wrong setting up your first tank, so i suggest you go with an easy FOWLER ( fish only with liverock ) first and than later on, adding a peacock. remember they are prown to shell rot, so only low lights. if you want corals, probably only softies will work. GL and feel free to ask questions!