You do not need to start over. Without fish in the aquarium your Ich will die within days. Think of ich as a mosquito which needs a host to feed on. Without fish, the Ich can not survive. Ich only has a 3 day life cycle, so waiting 5 days will be plenty of time.
Your biggest concern should be identifying why you had a disease outbreak to begin with. Test you pH, Ammonia, and Nitrite before adding any more fish.
Also, you had way to many fish in such a small tank. A pair of Balloon Molly's would have been plenty by themselves, and it looks like you had several more fish. Also, in such a small tank, you need to stick to only 1 species of fish. Mixing species in a small tank will only lead to stress on your fish and make them more suseptable to disease.
What pet shop are you working with? I'm curious who would suggest such a heavy stocking load in a small tank. The best shops for knowledgable employees in your area are Sandys Pet Shop, Pets Palace, Noah's Ark, Auburndale, & Southside Pets. I would stay away from the Feeders Supply & Super Pet stores...
- Taylorsville, KY
"Looking in windows, knocking on doors, they need to take seven and they might take yours."