clowns problem

[KMACAS]

they are only small clowns not even close to fullsize .I have two more tanks that are runing and I bought the clowns from a store in cal;gary and shipping was 80$ so I bought 12 of them .my intetion is to slplit them in three groups in three tanks.I also have african cichlids 10 tanks and I have more experiance with them then with saltwater fish.some of the clowns are only 1 in long and I was sure that for a week or two it would not be a problem.maybe I am wrong.