I've read lots about using citric acid as a stop, but all the posts are in the B&W forums. This is just to ask is there any issues with RA4 processing? I currently use white vinegar diluted 1:4 as a stop and that's fine. The problem is that my wife likes to use white vinegar for cleaning and we both blame each other when the stocks are low! Last night we had only a bit left and my stop was quite weak. I got horrible blue/green streaks on my prints and now I'll have to dump my blix which I'm not happy about. Can I change over to a citric acid stop?