Dwarf Cories and medication

I have 9 dwarf cories in a 10 gallon QT tank right now, they have been in there for 12 days. I started to see a couple of them flashing so its time for a treatment. I can't tell if they have ich, my eyes aren't that great. I'm treating them with tetra all in one treatment, it says 5ml per 5 gallons. Would they be ok with a full 10ml dose everyday? I know some fish are sensitive to meds.