In such a big tank clowns would be relatively easy to look after. volitan wont work with them but there are dwarf lions you can look at.
You really need to decide what you wanna do yaself. We cant tell you whether to go SW or fresh although an arro will get to big for the tank if that helps. I wouldnt even put a silver in a 180 although i personally have a jardini in a 180 but they get smaller.
SW is for expensive and slightly more work but is def worth it.
And no table salt. You have to buy marine salt from LFS. If you wanna do SW buy a book or browse this sight alot more looking for questions you wanna know and then read the answers they got.
You really need to decide what you wanna do yaself. We cant tell you whether to go SW or fresh although an arro will get to big for the tank if that helps. I wouldnt even put a silver in a 180 although i personally have a jardini in a 180 but they get smaller.
SW is for expensive and slightly more work but is def worth it.
And no table salt. You have to buy marine salt from LFS. If you wanna do SW buy a book or browse this sight alot more looking for questions you wanna know and then read the answers they got.