I love this thread, I have the SAME thing going on beeguiles, I use RO water tho, d cannot figure out what the heck is going on with my nitrates, just yelled at my lfs dude for not shaking the bottle enough too :), but, reading everyone's comments I will just relax at 10 and not keep doing water changes. Just did 20%, did 20% 2 nights ago, I am freaking out over here. Said I couldn't go out tonight! I just added that shrimp and don't want to kill him. So now I'll relax. Maybe go get a beer. Or two. :)