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Set up the tank with filter, heater, substrate, floating plants and water. You'll need a steady source of ammonia, so what better one than some hardy fish. Danios, Rasboras, Platys or White Cloud Minnows are all good choices. These will easily tolerate the substandard water conditions that come with the nitrogen cycle. Put in the fish, 3 or 4 for every 10 gallons of water, feed a little every couple of days and test the tank water every day for ammonia or nitrite. Change a quarter of the water if you have a trace of either of these toxins. Test until there's no trace of these toxins and the tank is cycled.
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