Thanks, I should look at the date on the bottle, I know mine has to be a couple weeks old. I have keep it in a cool dark spot.
Do most of you just leave the cap off ( cap= the part unscrews then your able to pour into ur tank) or do you also remove the tip )tip= the part you pull out of the bottle?)
I remove both for the first 2 days after I run them through my UC for an hour.