I have a cycled 10 gallon with 6 guppies in it. There were 8, but about 3 weeks ago they got ich and 2 died. I treated all of them in the tank by raising the temp above 88 degrees. Within the first week of "treatment" the ich went away, but I left the temp up for another week.
I also have a cycled 5 gallon with a betta in it, and an uncycled 3.5 gallon with a betta in it. Could I move the guppies to the 5 gallon, and the 2 bettas to the 10 gallon. I've had it divided before, but I wasn't sure about how long the tank needed to be ich-free.