02-29-2012, 11:42 PM
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Depending on the temperature of your house, try looking into the following - rosy barb, american-flag fish, paradise fish, hillstream loach, zebra danio, odessa barb, garra. Look at their profiles and see if any are suitable. And try googling 'subtropical aquarium', you will find more suggestions.
Not all fish need a constant temperature all year round, in many places the water temperature will naturally drop in the winter then rise in the summer, and in fact it is this change in temperature that triggers spawning in some species.
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