Ok...you will have to excuse my tone here....BUT, are you saying that I can only have 4-5 fish in a 180 litre tank???
Definately not!
Depending on species chosen, you could keep ALOT. But if your LFS recomended you could add a PBT (POwder Blue Tang) and a Moorish Idol along with the other fish mentioned, you need to find a better LFS, thats rediculous, and they are after your money, clearly. They either dont have the best interests of the fish in mind, want money (and your continued business once the fish keep dying) or they just dont know anything about keeping marine fish. This is the good thing about advice gven over forums (whislt advice/opinion may differ) we dont make profit from your purchase, and whilst size limits on tanks are in high debate, we are trying to look out for your future purchases.
As mentioned in my previous post (
):
Gobies, Damsels, Cardinal fish, Dottybacks, Basslets
but you could add to that clownfish, Dwarf Angel fish, Blennies, Wrasses, Hawkfish, and dart fish.
You could add your mandarin, there is nothing stopping you. Make sure its feeding on frozen foods before it leaves your LFS if you do buy one, that will make your life ALOT easier. Make sure its also got a roundfull stomach, rather than a shrunken belly (goes for all fish none the less).
When we put down fish on a list, that list isnt a rule of thumb for your particular tank, nor does it define how many of that particular group of fish. You need to research the individual requirements of fish, and make sure each fish will get along with others, keeping away from boistrous or territorial fish etc etc.
A good site to look at ( the recomended aquarium size there is ok with most species, but a little small in some cases, but non the less more honest with you than your LFS) is liveaquaria.com. Get a feel for what fish youd like, and what aquarium they might need.
There is really no "inches per so many litres/gallons" rule in SW (just high medium or low stocking). Theres more enphasis placed on the individuals behaviour of the species, and their relationships with other fish.