04-22-2012, 12:06 PM
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First off, welcome to Tropical Fish Keeping forum.
I am not absolutely certain what fish you have named, the link does not work, but I will assume the fish to be the Harlequin Rasbora, Trigonostigma heteromorpha. You can click the shaded name to see the profile with photos. If this is the species, it needs a larger group, no less than 6 but 8 or more is better, and that means a much larger tank space, no less than a 24-inch tank such as a 15g or 20g.
As for the cylcing, if live plants are intended you willnot need to do any "cycle" as the plants will do it for you. They assimilate ammonia as their preferred source of nitrogen. The temperature question is not relevant now, but for the record, a temp of 85F is very warm and this would likely affect some plants and fish long-term.