Well really I guess it depends on how experienced you are and what you are sustaining in your ecosystem. Any pics of the tank.? What corals do you have already? I use a year as an approximate estimation for sps and clams but you would probably be ok. You can always try an easy sps like a monti or digi and see if it lives. More information about your tank would help also. What kind of lighting are you running etc. Tell me about your system.
I have a 55g tank. Reef octopus hob skimmer. Two 120w dimmable LED units. 10g sump w/ breeder basket with caulerpa & chaeto.
fish:
Pair of Snowflake Clowns
Barlett's Anthias
Lyretail Anthias
Diamond Goby
Yellow-Eye Kole Tang
Inverts:
2 cleaner shrimp
2 hawaiin feather dusters
tons of mini ones on 1 peice of lR
4 nassarius snails
2 turbo snails
a handful of blue leg hermit crabs
Corals: off the top of my head
bubble coral (grew 2x the size)
pink birdsnest (just got it on Thursday)
Green monti cap (just got it on Thursday)
torch coral (had 1 now has 2 heads)
2 head duncan coral
multiple types of zoas
frogspawn
different types of mushrooms
branching goniopora (never fully opened like it did at the store a couple months ago)
Hammer coral not sure of the exact type it's brown w/ green tips
Green Candy Cane Coral. 2 frags - 1 had 3 heads 1 had 2 heads. The 3 headed one died bc it was tipped over in the sandbed and got white.
Open brain type of looking coral unsure of the exact name
I have pics on my tank thread.