cycle is not designed to treat tapwater, it is merely a bacteria supplement to speed up your cycle. THe truth is your fish may not get better. I mean hopefully they will but there is no way of saying exactly how soon they will seem fine again. You need to be testing the water mainly for ammonia, nitrites and nitrates as those are the three main chemicals involved in the process. First ammonia will appear, then nitrite, and then nitrate. The whole process can take up to 6 weeks but probably sooner with the aid of Cycle. Since those 3 chemicals are harmful to fish, the nitrogen cycle is a very stressful time on a fish. Mollies are strong fish but not always the best choice to start a new tank. Test the water for ammonia, nitrite and nitrate and do small water changes if you see any of those rising to unsafe conditions. You may want to use aquarium salt during the cycle process to help the fish conserve energy and fight of potential illness but I would stop using the salt after the cycle is complete.