Jim Spm was what i used on the rest of the carpet, guess you worked that out though, its like a lot of the other safe chemicals that i have had good results with M Power, fibresafe Gold etc but they let you down too often for my liking, although i hear people rave about them and get good results.
Did a wool berber that was the worst stains and soiling i had ever seen, used hot powerburst and acid rinsed with the Magma inline heater on full the results was incredible i could not believe how good it looked like a new carpet, could a safe, ph chemical do that