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  1. Freshwater and Tropical Fish
    I currently have a 30 gallon aquarium with two platies and three guppies along with a nerite snail in it. I also have a 10 gallon with 2 cory cats and 7 gold zebra danios. My goal is to combine these into the 30. Will the 7 danios at one time give too much of an amonia spike? Should I do them...