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First off, this is not a cheap hobby. You should know that upfront. It will cost you more then you know. Things just add up. However, you do not need to break the bank to have a nice looking and enjoyable tank.
I was wondering how much coral skeletons to fill my tank may cost.
I would not spend money on these. They generally just get covered in algea dn do not look very attractive. Look into LR
as an alternative. Much better for the tank and better looking as well.
Also I would like to know of some good begginer fish that cost a very low price, and are fun to look at.
Lots of options. Clownfish, chromis, coral beauty, gobies.
The first thing you should do is buy a good book on SW
tanks. I like "The Consceintious Marine Aquarist" by Robert Fenner.