A heavily planted tank is already cycled!
Um no its not. A cycle is the production of benefitial bacteria. A brand new tank, heavily planted or not, is not "cycled".
As to the OP's question, I used 10 drops of Ace Hardware brand ammonia to take my 10 gallon tank to 1-3 ppm. The Ace brand stuff is the only thing locally I could find that didn't contain surfactants (which you want to avoid).
10G - Low Tech Planted [ Chocolate Neos, MTS, Tracked Nerite / Anubias Nana, Windelov Java Fern, Water Wisteria, Dwarf Sag ]29G
- Non Planted Native Tank [ Creek Chub, Yellowfin Shiners, MTS / Water Wisteria ]