Like already mentioned, do a LOT of research. Below is a list of all the equipment and supplies that I believe are necessary for any type of saltwater tank so you can at least start pricing things.
- 90 gallon tank (get a reef ready one. External overflows suck)
- stand
- canopy or diy mesh top (not required, but some fish will carpet surf without one)
- lighting (do your research between metal halide, T5, and LED. Pick the one that suits you best)
- Sump/refugium (get the biggest one that will fit under your stand. You want a chamber that your skimmer can fit in, a chamber for growing macroalgae, and a section to put your return pump in)
- Protien skimmer (get one rated for at least 120 gallons with a 150 gallon rating ideal)
- Heater (two 150W heaters is plenty for that size tank)
- Circulation pumps (hydor korelia and jebao wp25 are good entry level, but go with tunze or vortech os you have the cash)
- Return pump (decide between submersible or external. You will need around 1200 gph for that size tank)
- Sand (make sure it is aragonite. Home depot sand or freshwater fish sand will not work)
- live rock (should be purchased only when the entire tank is set up, leak tested, and filled with heated saltwater. You will want between 60-100 lbs depending on how you want to aquascape)
- testing equipment (at minimum you will need a refractometer, and test solutions for ammonia, nitrate, nitrite, pH, alkalinity, calcium, and magnesium)
These are optional things that will make your life a lot easier.
- auto top off system (automatically replaces evaporated water with fresh water from a reservoir)
- RODI system (reverse osmosis system. Will save you tons of money in the long run and save you from hauling jugs of rodi water from the fish store)
- aquarium controller (used to automate and monitor the system)
- chiller (can sometimes be necessary in summer if your house gets hot in the summer and fans cant keep up)
If you ever want to talk in person and see how everything works, feel free to send me a PM. I live in westminster, so Im not too far away from ya.