i agree with tarheels910 a 30 is not big enough to have to many fish. so can get one type (always get more females if not they get to stressed when they are pregnant
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Genesis: 20 And God said, "Let the water teem with living creatures, and let birds fly above the earth across the expanse of the sky." 21 So God created the great creatures of the sea and every living and moving thing with which the water teems, according to their kinds, and every winged bird according to its kind. And God saw that it was good. 22 God blessed them and said, "Be fruitful and increase in number and fill the water in the seas, and let the birds increase on the earth."
