I 'inheritated' a bottle of the stuff, I think the dosage is one bottle to 1000litres of inhibitor/biocide
I do home made tracking with a ball of string and two steel tubes that are EXACTLY th esame length. needs lots of to-ing and fro-ing until you get teh string parallel to the wheels, then simple meauring tape at the rims, half a turn on each track rod end and Bobs your mother's brother etc