well you will need to get some liverock, I would say 25 to 30 pounds..
a nice heater 75 to100 watt , some sand for the bottom, not really a need for a protein skimmer on that size tank but that is up to you .. a good light setup t-5, led...
Thanks everyone,
I am unsure what kind of powerhead I need for my 54L,
I have found a 600L/H one but is this too much/little,
also the only thing I am realy interested in at this point is the cowrie snail, but i need to find a bit more about it.