#ed_op#P#ed_cl#Hello everyone#ed_op#/P#ed_cl##ed_op#P#ed_cl#I want to start a reef tank with fish, inverts and eventually, maybe corals. I've wanted to do this for as long as I can remember but being in the military I thought it wouldnot be cost effective at the time, but now that I'm about to retire and settle down in one place I thought it would be a good time to start. #ed_op#/P#ed_cl##ed_op#P#ed_cl#My question is, can you use regular play sand from a hardware store and add some live sand to it or does it have to be a special kind of sand. I have been reading here about half of the day and each time a question about sand comes up a particular brand name is mentioned. I also would like to know if I should use an under gravel filter with a tank likeI have mentioned. Any help or advice would be appreciated in regards to these or any other aspect of a reef tank since the only type of tank that I have been exposed to has been a freshwater 10 gallon setup#ed_op#/P#ed_cl##ed_op#P#ed_cl#Decisions made so far 45 gallon corner tank 22" x 22" x 13" x 13" x 13" X 24"tall#ed_op#/P#ed_cl##ed_op#P#ed_cl# 2" to 3" sand base#ed_op#/P#ed_cl##ed_op#P#ed_cl# Rock ( live and not live)#ed_op#/P#ed_cl##ed_op#P#ed_cl#Skimmer ( eventually ) suggestions? Right now is basic hang on type with filters.#ed_op#/P#ed_cl##ed_op#P#ed_cl# Basic lighting for now until I read up more on requirements for critters.#ed_op#/P#ed_cl##ed_op#P#ed_cl#Thanks in advance for any input and thanks for all the information already posted on this site, I've already answered a lot of my questions by reading post of others before me.#ed_op#/P#ed_cl#