Re: Is this normal? or did Imess up?
Not to worry. Airlock activity is not a good gauge of fermentation activity, as pressure differentials vary with barometric pressure, temperature, etc. Tap water won't harm anything unless your tap water is REALLY gross . How much top-up water for how much mead volume? I'm guessing 5 gallons since you used 5 campden tabs. Sulfiting is intended to protect the mead from oxidation, but with good siphoning technique isn't really necessary for a 1st rack as the still-active yeast will strip any incidentally-introduced O2.
At any rate, no harm done.
Bees, brews and fun
in Lyons, CO