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I have a 30 gallon tank with four zebra danios (I am starting over and I only added the four danios at one time). I bought them three days ago. They are very healthy and swim together, however, whenever I get close they FREAK out. They swim all over the place and hide. I get scared because they hit into plants and the sides. Since they are a schooling fish, I want to get more (probably four more). Will more of them in a school calm them down? Will they eventually get used to me? I mean my betta loves me. He comes up to the surface when I approach.