Just a word of caution. With 4 clowns in a relatively small tank you are probably going to run into agression problems in the future as they mature and pair off. Clowns are very territorial by nature and will agressively chase off fish many times their size. IMO I would suggest that you return 2 of them and get something else at a later date. Let your tank cycle some more for a month with just the 2 fish.
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