08-29-2010, 10:43 AM
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You need a starting point so I say check out the tropical fish profiles section here on the forum. I'd start with a school of something that really catches your eye and will do well in your tank size and water hardness/softness and then see what other types of fish will be compatable with the fish you choose.
The most active fish in my community tank are my green tiger barbs. They are gorgeous fish and very playful. They would do well in your size tank in a school of 6 or more. They are in my tank with a variety of tetras (pristellas, serpae, emperors) and get along great with them but you probably wouldn't want to temp them with long finned fish because they might want to nip at them.
Another way you could go is platies of which there are many varieties and colors. I'm not sure how to decipher your water hardness so you'd have to check that first. Your ph is right in line with their requirements.