I do hypo on every new fish i get ,,right out of the shipping bags(they usually are shipped in lower salinity ,depending where you get them)..
you can acclimate them to hypo conditions in about 6 hours ..I have never lost a fish by doing this ..I even go down to 1.008,,keep the fish in this salinity for 28 days ,,like said above ,raising it up must be done very slowly,,,.001 a day ...
Also ,a smaller QT (40 or under) will need constant monitoring ,,every 10 -12 hours for evaporation ..Draw a line on the tank at the proper water level for 1.008 and top off as often as needed to keep it there at all times ..
Hypo is not hard and i have never had a loss or an ich outbreak after doing it..
Good luck