Wow, 88F...you could try ice packs around the tank to lower the temp, keeping an eye that it doesn't et too cold.
I'm not sure, but I don't think Dwarf Gouramies are a good fish to cycle a tank with. The ones we have seem to be very sensetive to water parameter changes, and susceptable to disease, we have had to permanently house them in the 10 gal Qt tank because they seemed to be constantly sick in the community tank.
Don.