first thing you need to do is research. next, you need to relize that SH and pipes are not easy to care for. you need to be committed to keeping them and realize that it may or may not work. I myself have never kept seahorses, but I do know much about them because I researched them for a while, until I realsied they had no place in my tank.
for a first time SH I recomend either H. kuda or H. erectus. both are hardy as far as SH go, tho the latter is a better chioce. dwarf SH are a bad choice as they need very tiny tanks, correct feeding consentrations, live small foods like pods and BBS, as well as no other animals in the tank besides small shrimp (like red shrimp, and pods, and brine shrimp which will be eaten soon), they also need frequent feedings, and no things such as hydroids in the tank. I see you want to keep pipes in their as well, maybe best left untill you have mastered keeping SH and keeping perams stable ect. this is ot because of the pipes but because of the SH. the little poneys will produce a large amount of waste and it can be hard to keep up on WC and to not overstock. My edvice would be to get the poneys, after maybe 1 yr or so, if you feel you can, add the pipes.
for the tank,the temp needs to stay below 74F, as anything above causes stress in even tropical SH. Lighting is not an issue, but the stronger the light the more algae will grow on youre SH (yes the do grow algae on themselves!) but no light wont be good either. If you plan on keeping any corals or macro algae, choose lights that they will do best under. the flow should be low. oh and the tank size, for a pair of kuda or erectus a 29 gallon tank at least 18" high would be ideal, maybe you could get a pipefish in their w/ them too, but no more then that, a better choice is to get a 30 gallon tank. any tank above 29 gallon would be fine, it just needs to be at least 18" high (tho 21" is recomended by most experts).
powerful skimming is a very good idea, a sump big enough to hold a skimmer plus a decent size fuge is really good, as it will help to cultivate pods.
also, stinging corals and nems should be kept out of a SH tank, tho pipes are fine in a reef setting. hitch hiker nems like aptasia need to be apsent from the tank before and after the SH get introduced because of their powerful sting. you can however keep shrooms and zoas in the SH tank, tho they need to be slowly acclimated to the lower temps first. Keep all fish out of the tank, and only keep a small number of snails and maybe hermits in the tank for the algae. also be prepared to find baby SH in the tank if you do have a male/ female pair.
well, hope this long post comes in handy 4 U!
