Molly covered in small white spots

I would suggest even a tad higher with the temperature. At 86F (30 C) ich should be killed. The caution on the danios is well taken, but for one or even two weeks this should not cause trouble. Neale Monks taught me this, and it worked with my cories for two weeks. You can increase surface disturbance ("bubblers" do not do it, it must be disturbance at the surface) probably by re-positioning the filter return (depending upon the filter type). This will bring more oxygen into the water which always helps fish at higher temperatures.

Another possibly-related issue is the GH. What is the GH (general or total hardness) of your water? A ppH of 7 suggests it could be on the softer side than mollies need, and if so, this would weaken them which makes it harder for the fish to fight off ich or anything else, and over time will frankly kill them. If you are on municipal water, the GH may be listed on their website.

 

The disappearance of spots does not indicate the end of ich. When the spots fall off, the life cycle continues and the cysts now somewhere on the substrate will rupture and release dozens of parasites looking for a host fish. This is why we keep the temperature raised for at least a full week. It is only at this free-swimming stage (when the parasites are looking for a host fish) thgat ich can be killed. This stage lasts roughly 24 hours and the parasite then dies if it has not found a host.

On the temperature, as others have also noted, it has to be at least 86F (30C) to kill ich. Some may well slip through at lower temperatures.

On the pH, as essjay has since noted, you must deal with the GH. The pH will follow suit, but mollies like all livebearers must have minerals in the water and this is the GH level.