I lowered it to 1.007 by accident.The fish seemed fine and actually kinda happy.So,I kept it there for five days,then got it to 1.008 for 5 more days,then finished 13 days at 1.009.....After i lowered it too far(or so i thought)I did some web searching and came across people who will go to 1.005,so i felt better.I also read some say at level 1.012 is good enough,but the majority said 1.009 is the magic number.There is alot of crazy stuff out there,i also saw where some would do FW dips for 24-36 hours:shock:....I fell confident i kicked the ich,so ,a week to raise,then another week to watch,then back home:D...To some it may be over the top and unecessary to do all this,but it just makes me feel better.